diff --git a/lib/arrow/_version.py b/lib/arrow/_version.py
index 10aa336c..67bc602a 100644
--- a/lib/arrow/_version.py
+++ b/lib/arrow/_version.py
@@ -1 +1 @@
-__version__ = "1.2.3"
+__version__ = "1.3.0"
diff --git a/lib/arrow/arrow.py b/lib/arrow/arrow.py
index 1ede107f..8d329efd 100644
--- a/lib/arrow/arrow.py
+++ b/lib/arrow/arrow.py
@@ -168,9 +168,9 @@ class Arrow:
             isinstance(tzinfo, dt_tzinfo)
             and hasattr(tzinfo, "localize")
             and hasattr(tzinfo, "zone")
-            and tzinfo.zone  # type: ignore[attr-defined]
+            and tzinfo.zone
         ):
-            tzinfo = parser.TzinfoParser.parse(tzinfo.zone)  # type: ignore[attr-defined]
+            tzinfo = parser.TzinfoParser.parse(tzinfo.zone)
         elif isinstance(tzinfo, str):
             tzinfo = parser.TzinfoParser.parse(tzinfo)
 
@@ -495,7 +495,7 @@ class Arrow:
             yield current
 
             values = [getattr(current, f) for f in cls._ATTRS]
-            current = cls(*values, tzinfo=tzinfo).shift(  # type: ignore
+            current = cls(*values, tzinfo=tzinfo).shift(  # type: ignore[misc]
                 **{frame_relative: relative_steps}
             )
 
@@ -578,7 +578,7 @@ class Arrow:
             for _ in range(3 - len(values)):
                 values.append(1)
 
-            floor = self.__class__(*values, tzinfo=self.tzinfo)  # type: ignore
+            floor = self.__class__(*values, tzinfo=self.tzinfo)  # type: ignore[misc]
 
             if frame_absolute == "week":
                 # if week_start is greater than self.isoweekday() go back one week by setting delta = 7
@@ -792,7 +792,6 @@ class Arrow:
         return self._datetime.isoformat()
 
     def __format__(self, formatstr: str) -> str:
-
         if len(formatstr) > 0:
             return self.format(formatstr)
 
@@ -804,7 +803,6 @@ class Arrow:
     # attributes and properties
 
     def __getattr__(self, name: str) -> int:
-
         if name == "week":
             return self.isocalendar()[1]
 
@@ -965,7 +963,6 @@ class Arrow:
         absolute_kwargs = {}
 
         for key, value in kwargs.items():
-
             if key in self._ATTRS:
                 absolute_kwargs[key] = value
             elif key in ["week", "quarter"]:
@@ -1022,7 +1019,6 @@ class Arrow:
         additional_attrs = ["weeks", "quarters", "weekday"]
 
         for key, value in kwargs.items():
-
             if key in self._ATTRS_PLURAL or key in additional_attrs:
                 relative_kwargs[key] = value
             else:
@@ -1259,11 +1255,10 @@ class Arrow:
                     )
 
                 if trunc(abs(delta)) != 1:
-                    granularity += "s"  # type: ignore
+                    granularity += "s"  # type: ignore[assignment]
                 return locale.describe(granularity, delta, only_distance=only_distance)
 
             else:
-
                 if not granularity:
                     raise ValueError(
                         "Empty granularity list provided. "
@@ -1314,7 +1309,7 @@ class Arrow:
 
     def dehumanize(self, input_string: str, locale: str = "en_us") -> "Arrow":
         """Returns a new :class:`Arrow <arrow.arrow.Arrow>` object, that represents
-        the time difference relative to the attrbiutes of the
+        the time difference relative to the attributes of the
         :class:`Arrow <arrow.arrow.Arrow>` object.
 
         :param timestring: a ``str`` representing a humanized relative time.
@@ -1367,7 +1362,6 @@ class Arrow:
 
         # Search input string for each time unit within locale
         for unit, unit_object in locale_obj.timeframes.items():
-
             # Need to check the type of unit_object to create the correct dictionary
             if isinstance(unit_object, Mapping):
                 strings_to_search = unit_object
@@ -1378,7 +1372,6 @@ class Arrow:
             # Needs to cycle all through strings as some locales have strings that
             # could overlap in a regex match, since input validation isn't being performed.
             for time_delta, time_string in strings_to_search.items():
-
                 # Replace {0} with regex \d representing digits
                 search_string = str(time_string)
                 search_string = search_string.format(r"\d+")
@@ -1419,7 +1412,7 @@ class Arrow:
         # Assert error if string does not modify any units
         if not any([True for k, v in unit_visited.items() if v]):
             raise ValueError(
-                "Input string not valid. Note: Some locales do not support the week granulairty in Arrow. "
+                "Input string not valid. Note: Some locales do not support the week granularity in Arrow. "
                 "If you are attempting to use the week granularity on an unsupported locale, this could be the cause of this error."
             )
 
@@ -1718,7 +1711,6 @@ class Arrow:
     # math
 
     def __add__(self, other: Any) -> "Arrow":
-
         if isinstance(other, (timedelta, relativedelta)):
             return self.fromdatetime(self._datetime + other, self._datetime.tzinfo)
 
@@ -1736,7 +1728,6 @@ class Arrow:
         pass  # pragma: no cover
 
     def __sub__(self, other: Any) -> Union[timedelta, "Arrow"]:
-
         if isinstance(other, (timedelta, relativedelta)):
             return self.fromdatetime(self._datetime - other, self._datetime.tzinfo)
 
@@ -1749,7 +1740,6 @@ class Arrow:
         return NotImplemented
 
     def __rsub__(self, other: Any) -> timedelta:
-
         if isinstance(other, dt_datetime):
             return other - self._datetime
 
@@ -1758,42 +1748,36 @@ class Arrow:
     # comparisons
 
     def __eq__(self, other: Any) -> bool:
-
         if not isinstance(other, (Arrow, dt_datetime)):
             return False
 
         return self._datetime == self._get_datetime(other)
 
     def __ne__(self, other: Any) -> bool:
-
         if not isinstance(other, (Arrow, dt_datetime)):
             return True
 
         return not self.__eq__(other)
 
     def __gt__(self, other: Any) -> bool:
-
         if not isinstance(other, (Arrow, dt_datetime)):
             return NotImplemented
 
         return self._datetime > self._get_datetime(other)
 
     def __ge__(self, other: Any) -> bool:
-
         if not isinstance(other, (Arrow, dt_datetime)):
             return NotImplemented
 
         return self._datetime >= self._get_datetime(other)
 
     def __lt__(self, other: Any) -> bool:
-
         if not isinstance(other, (Arrow, dt_datetime)):
             return NotImplemented
 
         return self._datetime < self._get_datetime(other)
 
     def __le__(self, other: Any) -> bool:
-
         if not isinstance(other, (Arrow, dt_datetime)):
             return NotImplemented
 
@@ -1865,7 +1849,6 @@ class Arrow:
     def _get_iteration_params(cls, end: Any, limit: Optional[int]) -> Tuple[Any, int]:
         """Sets default end and limit values for range method."""
         if end is None:
-
             if limit is None:
                 raise ValueError("One of 'end' or 'limit' is required.")
 
diff --git a/lib/arrow/factory.py b/lib/arrow/factory.py
index aad4af8b..f35085f1 100644
--- a/lib/arrow/factory.py
+++ b/lib/arrow/factory.py
@@ -267,11 +267,9 @@ class ArrowFactory:
                 raise TypeError(f"Cannot parse single argument of type {type(arg)!r}.")
 
         elif arg_count == 2:
-
             arg_1, arg_2 = args[0], args[1]
 
             if isinstance(arg_1, datetime):
-
                 # (datetime, tzinfo/str) -> fromdatetime @ tzinfo
                 if isinstance(arg_2, (dt_tzinfo, str)):
                     return self.type.fromdatetime(arg_1, tzinfo=arg_2)
@@ -281,7 +279,6 @@ class ArrowFactory:
                     )
 
             elif isinstance(arg_1, date):
-
                 # (date, tzinfo/str) -> fromdate @ tzinfo
                 if isinstance(arg_2, (dt_tzinfo, str)):
                     return self.type.fromdate(arg_1, tzinfo=arg_2)
diff --git a/lib/arrow/formatter.py b/lib/arrow/formatter.py
index 728bea1a..d45f7153 100644
--- a/lib/arrow/formatter.py
+++ b/lib/arrow/formatter.py
@@ -29,7 +29,6 @@ FORMAT_W3C: Final[str] = "YYYY-MM-DD HH:mm:ssZZ"
 
 
 class DateTimeFormatter:
-
     # This pattern matches characters enclosed in square brackets are matched as
     # an atomic group. For more info on atomic groups and how to they are
     # emulated in Python's re library, see https://stackoverflow.com/a/13577411/2701578
@@ -41,18 +40,15 @@ class DateTimeFormatter:
     locale: locales.Locale
 
     def __init__(self, locale: str = DEFAULT_LOCALE) -> None:
-
         self.locale = locales.get_locale(locale)
 
     def format(cls, dt: datetime, fmt: str) -> str:
-
         # FIXME: _format_token() is nullable
         return cls._FORMAT_RE.sub(
             lambda m: cast(str, cls._format_token(dt, m.group(0))), fmt
         )
 
     def _format_token(self, dt: datetime, token: Optional[str]) -> Optional[str]:
-
         if token and token.startswith("[") and token.endswith("]"):
             return token[1:-1]
 
diff --git a/lib/arrow/locales.py b/lib/arrow/locales.py
index 3627497f..34b2a098 100644
--- a/lib/arrow/locales.py
+++ b/lib/arrow/locales.py
@@ -129,7 +129,6 @@ class Locale:
             _locale_map[locale_name.lower().replace("_", "-")] = cls
 
     def __init__(self) -> None:
-
         self._month_name_to_ordinal = None
 
     def describe(
@@ -174,7 +173,7 @@ class Locale:
             # Needed to determine the correct relative string to use
             timeframe_value = 0
 
-            for _unit_name, unit_value in timeframes:
+            for _, unit_value in timeframes:
                 if trunc(unit_value) != 0:
                     timeframe_value = trunc(unit_value)
                     break
@@ -285,7 +284,6 @@ class Locale:
         timeframe: TimeFrameLiteral,
         delta: Union[float, int],
     ) -> str:
-
         if timeframe == "now":
             return humanized
 
@@ -425,7 +423,7 @@ class ItalianLocale(Locale):
         "hours": "{0} ore",
         "day": "un giorno",
         "days": "{0} giorni",
-        "week": "una settimana,",
+        "week": "una settimana",
         "weeks": "{0} settimane",
         "month": "un mese",
         "months": "{0} mesi",
@@ -867,14 +865,16 @@ class FinnishLocale(Locale):
 
     timeframes: ClassVar[Mapping[TimeFrameLiteral, Union[str, Mapping[str, str]]]] = {
         "now": "juuri nyt",
-        "second": "sekunti",
-        "seconds": {"past": "{0} muutama sekunti", "future": "{0} muutaman sekunnin"},
+        "second": {"past": "sekunti", "future": "sekunnin"},
+        "seconds": {"past": "{0} sekuntia", "future": "{0} sekunnin"},
         "minute": {"past": "minuutti", "future": "minuutin"},
         "minutes": {"past": "{0} minuuttia", "future": "{0} minuutin"},
         "hour": {"past": "tunti", "future": "tunnin"},
         "hours": {"past": "{0} tuntia", "future": "{0} tunnin"},
-        "day": "päivä",
+        "day": {"past": "päivä", "future": "päivän"},
         "days": {"past": "{0} päivää", "future": "{0} päivän"},
+        "week": {"past": "viikko", "future": "viikon"},
+        "weeks": {"past": "{0} viikkoa", "future": "{0} viikon"},
         "month": {"past": "kuukausi", "future": "kuukauden"},
         "months": {"past": "{0} kuukautta", "future": "{0} kuukauden"},
         "year": {"past": "vuosi", "future": "vuoden"},
@@ -1887,7 +1887,7 @@ class GermanBaseLocale(Locale):
     future = "in {0}"
     and_word = "und"
 
-    timeframes = {
+    timeframes: ClassVar[Dict[TimeFrameLiteral, str]] = {
         "now": "gerade eben",
         "second": "einer Sekunde",
         "seconds": "{0} Sekunden",
@@ -1982,7 +1982,9 @@ class GermanBaseLocale(Locale):
             return super().describe(timeframe, delta, only_distance)
 
         # German uses a different case without 'in' or 'ago'
-        humanized = self.timeframes_only_distance[timeframe].format(trunc(abs(delta)))
+        humanized: str = self.timeframes_only_distance[timeframe].format(
+            trunc(abs(delta))
+        )
 
         return humanized
 
@@ -2547,6 +2549,8 @@ class ArabicLocale(Locale):
         "hours": {"2": "ساعتين", "ten": "{0} ساعات", "higher": "{0} ساعة"},
         "day": "يوم",
         "days": {"2": "يومين", "ten": "{0} أيام", "higher": "{0} يوم"},
+        "week": "اسبوع",
+        "weeks": {"2": "اسبوعين", "ten": "{0} أسابيع", "higher": "{0} اسبوع"},
         "month": "شهر",
         "months": {"2": "شهرين", "ten": "{0} أشهر", "higher": "{0} شهر"},
         "year": "سنة",
@@ -3709,6 +3713,8 @@ class HungarianLocale(Locale):
         "hours": {"past": "{0} órával", "future": "{0} óra"},
         "day": {"past": "egy nappal", "future": "egy nap"},
         "days": {"past": "{0} nappal", "future": "{0} nap"},
+        "week": {"past": "egy héttel", "future": "egy hét"},
+        "weeks": {"past": "{0} héttel", "future": "{0} hét"},
         "month": {"past": "egy hónappal", "future": "egy hónap"},
         "months": {"past": "{0} hónappal", "future": "{0} hónap"},
         "year": {"past": "egy évvel", "future": "egy év"},
@@ -3934,7 +3940,6 @@ class ThaiLocale(Locale):
 
 
 class LaotianLocale(Locale):
-
     names = ["lo", "lo-la"]
 
     past = "{0} ກ່ອນຫນ້ານີ້"
@@ -4119,6 +4124,7 @@ class BengaliLocale(Locale):
             return f"{n}র্থ"
         if n == 6:
             return f"{n}ষ্ঠ"
+        return ""
 
 
 class RomanshLocale(Locale):
@@ -4137,6 +4143,8 @@ class RomanshLocale(Locale):
         "hours": "{0} ura",
         "day": "in di",
         "days": "{0} dis",
+        "week": "in'emna",
+        "weeks": "{0} emnas",
         "month": "in mais",
         "months": "{0} mais",
         "year": "in onn",
@@ -5399,7 +5407,7 @@ class LuxembourgishLocale(Locale):
     future = "an {0}"
     and_word = "an"
 
-    timeframes = {
+    timeframes: ClassVar[Dict[TimeFrameLiteral, str]] = {
         "now": "just elo",
         "second": "enger Sekonn",
         "seconds": "{0} Sekonnen",
@@ -5487,7 +5495,9 @@ class LuxembourgishLocale(Locale):
             return super().describe(timeframe, delta, only_distance)
 
         # Luxembourgish uses a different case without 'in' or 'ago'
-        humanized = self.timeframes_only_distance[timeframe].format(trunc(abs(delta)))
+        humanized: str = self.timeframes_only_distance[timeframe].format(
+            trunc(abs(delta))
+        )
 
         return humanized
 
diff --git a/lib/arrow/parser.py b/lib/arrow/parser.py
index e95d78b0..645e3da7 100644
--- a/lib/arrow/parser.py
+++ b/lib/arrow/parser.py
@@ -159,7 +159,6 @@ class DateTimeParser:
     _input_re_map: Dict[_FORMAT_TYPE, Pattern[str]]
 
     def __init__(self, locale: str = DEFAULT_LOCALE, cache_size: int = 0) -> None:
-
         self.locale = locales.get_locale(locale)
         self._input_re_map = self._BASE_INPUT_RE_MAP.copy()
         self._input_re_map.update(
@@ -196,7 +195,6 @@ class DateTimeParser:
     def parse_iso(
         self, datetime_string: str, normalize_whitespace: bool = False
     ) -> datetime:
-
         if normalize_whitespace:
             datetime_string = re.sub(r"\s+", " ", datetime_string.strip())
 
@@ -236,13 +234,14 @@ class DateTimeParser:
         ]
 
         if has_time:
-
             if has_space_divider:
                 date_string, time_string = datetime_string.split(" ", 1)
             else:
                 date_string, time_string = datetime_string.split("T", 1)
 
-            time_parts = re.split(r"[\+\-Z]", time_string, 1, re.IGNORECASE)
+            time_parts = re.split(
+                r"[\+\-Z]", time_string, maxsplit=1, flags=re.IGNORECASE
+            )
 
             time_components: Optional[Match[str]] = self._TIME_RE.match(time_parts[0])
 
@@ -303,7 +302,6 @@ class DateTimeParser:
         fmt: Union[List[str], str],
         normalize_whitespace: bool = False,
     ) -> datetime:
-
         if normalize_whitespace:
             datetime_string = re.sub(r"\s+", " ", datetime_string)
 
@@ -341,12 +339,11 @@ class DateTimeParser:
                     f"Unable to find a match group for the specified token {token!r}."
                 )
 
-            self._parse_token(token, value, parts)  # type: ignore
+            self._parse_token(token, value, parts)  # type: ignore[arg-type]
 
         return self._build_datetime(parts)
 
     def _generate_pattern_re(self, fmt: str) -> Tuple[List[_FORMAT_TYPE], Pattern[str]]:
-
         # fmt is a string of tokens like 'YYYY-MM-DD'
         # we construct a new string by replacing each
         # token by its pattern:
@@ -498,7 +495,6 @@ class DateTimeParser:
         value: Any,
         parts: _Parts,
     ) -> None:
-
         if token == "YYYY":
             parts["year"] = int(value)
 
@@ -508,7 +504,7 @@ class DateTimeParser:
 
         elif token in ["MMMM", "MMM"]:
             # FIXME: month_number() is nullable
-            parts["month"] = self.locale.month_number(value.lower())  # type: ignore
+            parts["month"] = self.locale.month_number(value.lower())  # type: ignore[typeddict-item]
 
         elif token in ["MM", "M"]:
             parts["month"] = int(value)
@@ -588,7 +584,6 @@ class DateTimeParser:
         weekdate = parts.get("weekdate")
 
         if weekdate is not None:
-
             year, week = int(weekdate[0]), int(weekdate[1])
 
             if weekdate[2] is not None:
@@ -712,7 +707,6 @@ class DateTimeParser:
         )
 
     def _parse_multiformat(self, string: str, formats: Iterable[str]) -> datetime:
-
         _datetime: Optional[datetime] = None
 
         for fmt in formats:
@@ -740,12 +734,11 @@ class DateTimeParser:
 
 class TzinfoParser:
     _TZINFO_RE: ClassVar[Pattern[str]] = re.compile(
-        r"^([\+\-])?(\d{2})(?:\:?(\d{2}))?$"
+        r"^(?:\(UTC)*([\+\-])?(\d{2})(?:\:?(\d{2}))?"
     )
 
     @classmethod
     def parse(cls, tzinfo_string: str) -> dt_tzinfo:
-
         tzinfo: Optional[dt_tzinfo] = None
 
         if tzinfo_string == "local":
@@ -755,7 +748,6 @@ class TzinfoParser:
             tzinfo = tz.tzutc()
 
         else:
-
             iso_match = cls._TZINFO_RE.match(tzinfo_string)
 
             if iso_match:
diff --git a/lib/dateutil-stubs/METADATA.toml b/lib/dateutil-stubs/METADATA.toml
new file mode 100644
index 00000000..5f2be1e4
--- /dev/null
+++ b/lib/dateutil-stubs/METADATA.toml
@@ -0,0 +1,6 @@
+version = "2.9.*"
+upstream_repository = "https://github.com/dateutil/dateutil"
+partial_stub = true
+
+[tool.stubtest]
+ignore_missing_stub = true
diff --git a/lib/dateutil-stubs/__init__.pyi b/lib/dateutil-stubs/__init__.pyi
new file mode 100644
index 00000000..e69de29b
diff --git a/lib/dateutil-stubs/_common.pyi b/lib/dateutil-stubs/_common.pyi
new file mode 100644
index 00000000..75bf74c5
--- /dev/null
+++ b/lib/dateutil-stubs/_common.pyi
@@ -0,0 +1,9 @@
+from typing_extensions import Self
+
+class weekday:
+    def __init__(self, weekday: int, n: int | None = None) -> None: ...
+    def __call__(self, n: int) -> Self: ...
+    def __eq__(self, other: object) -> bool: ...
+    def __hash__(self) -> int: ...
+    weekday: int
+    n: int
diff --git a/lib/dateutil-stubs/easter.pyi b/lib/dateutil-stubs/easter.pyi
new file mode 100644
index 00000000..952d1191
--- /dev/null
+++ b/lib/dateutil-stubs/easter.pyi
@@ -0,0 +1,8 @@
+from datetime import date
+from typing import Literal
+
+EASTER_JULIAN: Literal[1]
+EASTER_ORTHODOX: Literal[2]
+EASTER_WESTERN: Literal[3]
+
+def easter(year: int, method: Literal[1, 2, 3] = 3) -> date: ...
diff --git a/lib/dateutil-stubs/parser/__init__.pyi b/lib/dateutil-stubs/parser/__init__.pyi
new file mode 100644
index 00000000..c375ff15
--- /dev/null
+++ b/lib/dateutil-stubs/parser/__init__.pyi
@@ -0,0 +1,67 @@
+from collections.abc import Callable, Mapping
+from datetime import datetime, tzinfo
+from typing import IO, Any
+from typing_extensions import TypeAlias
+
+from .isoparser import isoparse as isoparse, isoparser as isoparser
+
+_FileOrStr: TypeAlias = bytes | str | IO[str] | IO[Any]
+_TzData: TypeAlias = tzinfo | int | str | None
+_TzInfo: TypeAlias = Mapping[str, _TzData] | Callable[[str, int], _TzData]
+
+class parserinfo:
+    JUMP: list[str]
+    WEEKDAYS: list[tuple[str, ...]]
+    MONTHS: list[tuple[str, ...]]
+    HMS: list[tuple[str, str, str]]
+    AMPM: list[tuple[str, str]]
+    UTCZONE: list[str]
+    PERTAIN: list[str]
+    TZOFFSET: dict[str, int]
+    def __init__(self, dayfirst: bool = False, yearfirst: bool = False) -> None: ...
+    def jump(self, name: str) -> bool: ...
+    def weekday(self, name: str) -> int | None: ...
+    def month(self, name: str) -> int | None: ...
+    def hms(self, name: str) -> int | None: ...
+    def ampm(self, name: str) -> int | None: ...
+    def pertain(self, name: str) -> bool: ...
+    def utczone(self, name: str) -> bool: ...
+    def tzoffset(self, name: str) -> int | None: ...
+    def convertyear(self, year: int) -> int: ...
+    def validate(self, res: datetime) -> bool: ...
+
+class parser:
+    def __init__(self, info: parserinfo | None = None) -> None: ...
+    def parse(
+        self,
+        timestr: _FileOrStr,
+        default: datetime | None = None,
+        ignoretz: bool = False,
+        tzinfos: _TzInfo | None = None,
+        *,
+        dayfirst: bool | None = ...,
+        yearfirst: bool | None = ...,
+        fuzzy: bool = ...,
+        fuzzy_with_tokens: bool = ...,
+    ) -> datetime: ...
+
+DEFAULTPARSER: parser
+
+def parse(
+    timestr: _FileOrStr,
+    parserinfo: parserinfo | None = None,
+    *,
+    dayfirst: bool | None = ...,
+    yearfirst: bool | None = ...,
+    ignoretz: bool = ...,
+    fuzzy: bool = ...,
+    fuzzy_with_tokens: bool = ...,
+    default: datetime | None = ...,
+    tzinfos: _TzInfo | None = ...,
+) -> datetime: ...
+
+class _tzparser: ...
+
+DEFAULTTZPARSER: _tzparser
+
+class ParserError(ValueError): ...
diff --git a/lib/dateutil-stubs/parser/isoparser.pyi b/lib/dateutil-stubs/parser/isoparser.pyi
new file mode 100644
index 00000000..fc5e46d9
--- /dev/null
+++ b/lib/dateutil-stubs/parser/isoparser.pyi
@@ -0,0 +1,15 @@
+from _typeshed import SupportsRead
+from datetime import date, datetime, time, tzinfo
+from typing_extensions import TypeAlias
+
+_Readable: TypeAlias = SupportsRead[str | bytes]
+_TakesAscii: TypeAlias = str | bytes | _Readable
+
+class isoparser:
+    def __init__(self, sep: str | bytes | None = None): ...
+    def isoparse(self, dt_str: _TakesAscii) -> datetime: ...
+    def parse_isodate(self, datestr: _TakesAscii) -> date: ...
+    def parse_isotime(self, timestr: _TakesAscii) -> time: ...
+    def parse_tzstr(self, tzstr: _TakesAscii, zero_as_utc: bool = True) -> tzinfo: ...
+
+def isoparse(dt_str: _TakesAscii) -> datetime: ...
diff --git a/lib/dateutil-stubs/py.typed b/lib/dateutil-stubs/py.typed
new file mode 100644
index 00000000..b648ac92
--- /dev/null
+++ b/lib/dateutil-stubs/py.typed
@@ -0,0 +1 @@
+partial
diff --git a/lib/dateutil-stubs/relativedelta.pyi b/lib/dateutil-stubs/relativedelta.pyi
new file mode 100644
index 00000000..394713db
--- /dev/null
+++ b/lib/dateutil-stubs/relativedelta.pyi
@@ -0,0 +1,97 @@
+from datetime import date, timedelta
+from typing import SupportsFloat, TypeVar, overload
+from typing_extensions import Self, TypeAlias
+
+# See #9817 for why we reexport this here
+from ._common import weekday as weekday
+
+_DateT = TypeVar("_DateT", bound=date)
+# Work around attribute and type having the same name.
+_Weekday: TypeAlias = weekday
+
+MO: weekday
+TU: weekday
+WE: weekday
+TH: weekday
+FR: weekday
+SA: weekday
+SU: weekday
+
+class relativedelta:
+    years: int
+    months: int
+    days: int
+    leapdays: int
+    hours: int
+    minutes: int
+    seconds: int
+    microseconds: int
+    year: int | None
+    month: int | None
+    weekday: _Weekday | None
+    day: int | None
+    hour: int | None
+    minute: int | None
+    second: int | None
+    microsecond: int | None
+    def __init__(
+        self,
+        dt1: date | None = None,
+        dt2: date | None = None,
+        years: int | None = 0,
+        months: int | None = 0,
+        days: int | None = 0,
+        leapdays: int | None = 0,
+        weeks: int | None = 0,
+        hours: int | None = 0,
+        minutes: int | None = 0,
+        seconds: int | None = 0,
+        microseconds: int | None = 0,
+        year: int | None = None,
+        month: int | None = None,
+        day: int | None = None,
+        weekday: int | _Weekday | None = None,
+        yearday: int | None = None,
+        nlyearday: int | None = None,
+        hour: int | None = None,
+        minute: int | None = None,
+        second: int | None = None,
+        microsecond: int | None = None,
+    ) -> None: ...
+    @property
+    def weeks(self) -> int: ...
+    @weeks.setter
+    def weeks(self, value: int) -> None: ...
+    def normalized(self) -> Self: ...
+    # TODO: use Union when mypy will handle it properly in overloaded operator
+    # methods (#2129, #1442, #1264 in mypy)
+    @overload
+    def __add__(self, other: relativedelta) -> Self: ...
+    @overload
+    def __add__(self, other: timedelta) -> Self: ...
+    @overload
+    def __add__(self, other: _DateT) -> _DateT: ...
+    @overload
+    def __radd__(self, other: relativedelta) -> Self: ...
+    @overload
+    def __radd__(self, other: timedelta) -> Self: ...
+    @overload
+    def __radd__(self, other: _DateT) -> _DateT: ...
+    @overload
+    def __rsub__(self, other: relativedelta) -> Self: ...
+    @overload
+    def __rsub__(self, other: timedelta) -> Self: ...
+    @overload
+    def __rsub__(self, other: _DateT) -> _DateT: ...
+    def __sub__(self, other: relativedelta) -> Self: ...
+    def __neg__(self) -> Self: ...
+    def __bool__(self) -> bool: ...
+    def __nonzero__(self) -> bool: ...
+    def __mul__(self, other: SupportsFloat) -> Self: ...
+    def __rmul__(self, other: SupportsFloat) -> Self: ...
+    def __eq__(self, other: object) -> bool: ...
+    def __ne__(self, other: object) -> bool: ...
+    def __div__(self, other: SupportsFloat) -> Self: ...
+    def __truediv__(self, other: SupportsFloat) -> Self: ...
+    def __abs__(self) -> Self: ...
+    def __hash__(self) -> int: ...
diff --git a/lib/dateutil-stubs/rrule.pyi b/lib/dateutil-stubs/rrule.pyi
new file mode 100644
index 00000000..f091cfbd
--- /dev/null
+++ b/lib/dateutil-stubs/rrule.pyi
@@ -0,0 +1,111 @@
+import datetime
+from _typeshed import Incomplete
+from collections.abc import Iterable, Iterator, Sequence
+from typing_extensions import TypeAlias
+
+from ._common import weekday as weekdaybase
+
+YEARLY: int
+MONTHLY: int
+WEEKLY: int
+DAILY: int
+HOURLY: int
+MINUTELY: int
+SECONDLY: int
+
+class weekday(weekdaybase): ...
+
+weekdays: tuple[weekday, weekday, weekday, weekday, weekday, weekday, weekday]
+MO: weekday
+TU: weekday
+WE: weekday
+TH: weekday
+FR: weekday
+SA: weekday
+SU: weekday
+
+class rrulebase:
+    def __init__(self, cache: bool = False) -> None: ...
+    def __iter__(self) -> Iterator[datetime.datetime]: ...
+    def __getitem__(self, item): ...
+    def __contains__(self, item): ...
+    def count(self): ...
+    def before(self, dt, inc: bool = False): ...
+    def after(self, dt, inc: bool = False): ...
+    def xafter(self, dt, count: Incomplete | None = None, inc: bool = False): ...
+    def between(self, after, before, inc: bool = False, count: int = 1): ...
+
+class rrule(rrulebase):
+    def __init__(
+        self,
+        freq,
+        dtstart: datetime.date | None = None,
+        interval: int = 1,
+        wkst: weekday | int | None = None,
+        count: int | None = None,
+        until: datetime.date | int | None = None,
+        bysetpos: int | Iterable[int] | None = None,
+        bymonth: int | Iterable[int] | None = None,
+        bymonthday: int | Iterable[int] | None = None,
+        byyearday: int | Iterable[int] | None = None,
+        byeaster: int | Iterable[int] | None = None,
+        byweekno: int | Iterable[int] | None = None,
+        byweekday: int | weekday | Iterable[int] | Iterable[weekday] | None = None,
+        byhour: int | Iterable[int] | None = None,
+        byminute: int | Iterable[int] | None = None,
+        bysecond: int | Iterable[int] | None = None,
+        cache: bool = False,
+    ) -> None: ...
+    def replace(self, **kwargs): ...
+
+_RRule: TypeAlias = rrule
+
+class _iterinfo:
+    rrule: _RRule
+    def __init__(self, rrule: _RRule) -> None: ...
+    yearlen: int | None
+    nextyearlen: int | None
+    yearordinal: int | None
+    yearweekday: int | None
+    mmask: Sequence[int] | None
+    mdaymask: Sequence[int] | None
+    nmdaymask: Sequence[int] | None
+    wdaymask: Sequence[int] | None
+    mrange: Sequence[int] | None
+    wnomask: Sequence[int] | None
+    nwdaymask: Sequence[int] | None
+    eastermask: Sequence[int] | None
+    lastyear: int | None
+    lastmonth: int | None
+    def rebuild(self, year, month): ...
+    def ydayset(self, year, month, day): ...
+    def mdayset(self, year, month, day): ...
+    def wdayset(self, year, month, day): ...
+    def ddayset(self, year, month, day): ...
+    def htimeset(self, hour, minute, second): ...
+    def mtimeset(self, hour, minute, second): ...
+    def stimeset(self, hour, minute, second): ...
+
+class rruleset(rrulebase):
+    class _genitem:
+        dt: Incomplete
+        genlist: list[Incomplete]
+        gen: Incomplete
+        def __init__(self, genlist, gen) -> None: ...
+        def __next__(self) -> None: ...
+        next = __next__
+        def __lt__(self, other) -> bool: ...
+        def __gt__(self, other) -> bool: ...
+        def __eq__(self, other) -> bool: ...
+        def __ne__(self, other) -> bool: ...
+
+    def __init__(self, cache: bool = False) -> None: ...
+    def rrule(self, rrule: _RRule): ...
+    def rdate(self, rdate): ...
+    def exrule(self, exrule): ...
+    def exdate(self, exdate): ...
+
+class _rrulestr:
+    def __call__(self, s, **kwargs) -> rrule | rruleset: ...
+
+rrulestr: _rrulestr
diff --git a/lib/dateutil-stubs/tz/__init__.pyi b/lib/dateutil-stubs/tz/__init__.pyi
new file mode 100644
index 00000000..334ca482
--- /dev/null
+++ b/lib/dateutil-stubs/tz/__init__.pyi
@@ -0,0 +1,15 @@
+from .tz import (
+    datetime_ambiguous as datetime_ambiguous,
+    datetime_exists as datetime_exists,
+    gettz as gettz,
+    resolve_imaginary as resolve_imaginary,
+    tzfile as tzfile,
+    tzical as tzical,
+    tzlocal as tzlocal,
+    tzoffset as tzoffset,
+    tzrange as tzrange,
+    tzstr as tzstr,
+    tzutc as tzutc,
+)
+
+UTC: tzutc
diff --git a/lib/dateutil-stubs/tz/_common.pyi b/lib/dateutil-stubs/tz/_common.pyi
new file mode 100644
index 00000000..4e64822f
--- /dev/null
+++ b/lib/dateutil-stubs/tz/_common.pyi
@@ -0,0 +1,28 @@
+import abc
+from datetime import datetime, timedelta, tzinfo
+from typing import ClassVar
+
+def tzname_in_python2(namefunc): ...
+def enfold(dt: datetime, fold: int = 1): ...
+
+class _DatetimeWithFold(datetime):
+    @property
+    def fold(self): ...
+
+# Doesn't actually have ABCMeta as the metaclass at runtime,
+# but mypy complains if we don't have it in the stub.
+# See discussion in #8908
+class _tzinfo(tzinfo, metaclass=abc.ABCMeta):
+    def is_ambiguous(self, dt: datetime) -> bool: ...
+    def fromutc(self, dt: datetime) -> datetime: ...
+
+class tzrangebase(_tzinfo):
+    def __init__(self) -> None: ...
+    def utcoffset(self, dt: datetime | None) -> timedelta | None: ...
+    def dst(self, dt: datetime | None) -> timedelta | None: ...
+    def tzname(self, dt: datetime | None) -> str: ...
+    def fromutc(self, dt: datetime) -> datetime: ...
+    def is_ambiguous(self, dt: datetime) -> bool: ...
+    __hash__: ClassVar[None]  # type: ignore[assignment]
+    def __ne__(self, other): ...
+    __reduce__ = object.__reduce__
diff --git a/lib/dateutil-stubs/tz/tz.pyi b/lib/dateutil-stubs/tz/tz.pyi
new file mode 100644
index 00000000..6addba65
--- /dev/null
+++ b/lib/dateutil-stubs/tz/tz.pyi
@@ -0,0 +1,115 @@
+import datetime
+from _typeshed import Incomplete
+from typing import ClassVar, Literal, Protocol, TypeVar
+
+from ..relativedelta import relativedelta
+from ._common import _tzinfo as _tzinfo, enfold as enfold, tzname_in_python2 as tzname_in_python2, tzrangebase as tzrangebase
+
+_DT = TypeVar("_DT", bound=datetime.datetime)
+
+ZERO: datetime.timedelta
+EPOCH: datetime.datetime
+EPOCHORDINAL: int
+
+class tzutc(datetime.tzinfo):
+    def utcoffset(self, dt: datetime.datetime | None) -> datetime.timedelta | None: ...
+    def dst(self, dt: datetime.datetime | None) -> datetime.timedelta | None: ...
+    def tzname(self, dt: datetime.datetime | None) -> str: ...
+    def is_ambiguous(self, dt: datetime.datetime | None) -> bool: ...
+    def fromutc(self, dt: _DT) -> _DT: ...
+    def __eq__(self, other): ...
+    __hash__: ClassVar[None]  # type: ignore[assignment]
+    def __ne__(self, other): ...
+    __reduce__ = object.__reduce__
+
+class tzoffset(datetime.tzinfo):
+    def __init__(self, name, offset) -> None: ...
+    def utcoffset(self, dt: datetime.datetime | None) -> datetime.timedelta | None: ...
+    def dst(self, dt: datetime.datetime | None) -> datetime.timedelta | None: ...
+    def is_ambiguous(self, dt: datetime.datetime | None) -> bool: ...
+    def tzname(self, dt: datetime.datetime | None) -> str: ...
+    def fromutc(self, dt: _DT) -> _DT: ...
+    def __eq__(self, other): ...
+    __hash__: ClassVar[None]  # type: ignore[assignment]
+    def __ne__(self, other): ...
+    __reduce__ = object.__reduce__
+    @classmethod
+    def instance(cls, name, offset) -> tzoffset: ...
+
+class tzlocal(_tzinfo):
+    def __init__(self) -> None: ...
+    def utcoffset(self, dt: datetime.datetime | None) -> datetime.timedelta | None: ...
+    def dst(self, dt: datetime.datetime | None) -> datetime.timedelta | None: ...
+    def tzname(self, dt: datetime.datetime | None) -> str: ...
+    def is_ambiguous(self, dt: datetime.datetime | None) -> bool: ...
+    def __eq__(self, other): ...
+    __hash__: ClassVar[None]  # type: ignore[assignment]
+    def __ne__(self, other): ...
+    __reduce__ = object.__reduce__
+
+class _ttinfo:
+    def __init__(self) -> None: ...
+    def __eq__(self, other): ...
+    __hash__: ClassVar[None]  # type: ignore[assignment]
+    def __ne__(self, other): ...
+
+class _TZFileReader(Protocol):
+    # optional attribute:
+    # name: str
+    def read(self, size: int, /) -> bytes: ...
+    def seek(self, target: int, whence: Literal[1], /) -> object: ...
+
+class tzfile(_tzinfo):
+    def __init__(self, fileobj: str | _TZFileReader, filename: str | None = None) -> None: ...
+    def is_ambiguous(self, dt: datetime.datetime | None, idx: int | None = None) -> bool: ...
+    def utcoffset(self, dt: datetime.datetime | None) -> datetime.timedelta | None: ...
+    def dst(self, dt: datetime.datetime | None) -> datetime.timedelta | None: ...
+    def tzname(self, dt: datetime.datetime | None) -> str: ...
+    def __eq__(self, other): ...
+    __hash__: ClassVar[None]  # type: ignore[assignment]
+    def __ne__(self, other): ...
+    def __reduce__(self): ...
+    def __reduce_ex__(self, protocol): ...
+
+class tzrange(tzrangebase):
+    hasdst: bool
+    def __init__(
+        self,
+        stdabbr: str,
+        stdoffset: int | datetime.timedelta | None = None,
+        dstabbr: str | None = None,
+        dstoffset: int | datetime.timedelta | None = None,
+        start: relativedelta | None = None,
+        end: relativedelta | None = None,
+    ) -> None: ...
+    def transitions(self, year: int) -> tuple[datetime.datetime, datetime.datetime]: ...
+    def __eq__(self, other): ...
+
+class tzstr(tzrange):
+    hasdst: bool
+    def __init__(self, s: str, posix_offset: bool = False) -> None: ...
+    @classmethod
+    def instance(cls, name, offset) -> tzoffset: ...
+
+class _ICalReader(Protocol):
+    # optional attribute:
+    # name: str
+    def read(self) -> str: ...
+
+class tzical:
+    def __init__(self, fileobj: str | _ICalReader) -> None: ...
+    def keys(self): ...
+    def get(self, tzid: Incomplete | None = None): ...
+
+TZFILES: list[str]
+TZPATHS: list[str]
+
+def datetime_exists(dt: datetime.datetime, tz: datetime.tzinfo | None = None) -> bool: ...
+def datetime_ambiguous(dt: datetime.datetime, tz: datetime.tzinfo | None = None) -> bool: ...
+def resolve_imaginary(dt: datetime.datetime) -> datetime.datetime: ...
+
+class _GetTZ:
+    def __call__(self, name: str | None = ...) -> datetime.tzinfo | None: ...
+    def nocache(self, name: str | None) -> datetime.tzinfo | None: ...
+
+gettz: _GetTZ
diff --git a/lib/dateutil-stubs/utils.pyi b/lib/dateutil-stubs/utils.pyi
new file mode 100644
index 00000000..8c9f5e44
--- /dev/null
+++ b/lib/dateutil-stubs/utils.pyi
@@ -0,0 +1,5 @@
+from datetime import datetime, timedelta, tzinfo
+
+def default_tzinfo(dt: datetime, tzinfo: tzinfo) -> datetime: ...
+def today(tzinfo: tzinfo | None = None) -> datetime: ...
+def within_delta(dt1: datetime, dt2: datetime, delta: timedelta) -> bool: ...
diff --git a/lib/dateutil-stubs/zoneinfo/__init__.pyi b/lib/dateutil-stubs/zoneinfo/__init__.pyi
new file mode 100644
index 00000000..7bd2845a
--- /dev/null
+++ b/lib/dateutil-stubs/zoneinfo/__init__.pyi
@@ -0,0 +1,17 @@
+from _typeshed import Incomplete
+from typing import IO
+from typing_extensions import TypeAlias
+
+__all__ = ["get_zonefile_instance", "gettz", "gettz_db_metadata"]
+
+_MetadataType: TypeAlias = dict[str, Incomplete]
+
+class ZoneInfoFile:
+    zones: dict[Incomplete, Incomplete]
+    metadata: _MetadataType | None
+    def __init__(self, zonefile_stream: IO[bytes] | None = None) -> None: ...
+    def get(self, name, default: Incomplete | None = None): ...
+
+def get_zonefile_instance(new_instance: bool = False) -> ZoneInfoFile: ...
+def gettz(name): ...
+def gettz_db_metadata() -> _MetadataType: ...
diff --git a/lib/dateutil-stubs/zoneinfo/rebuild.pyi b/lib/dateutil-stubs/zoneinfo/rebuild.pyi
new file mode 100644
index 00000000..e3845926
--- /dev/null
+++ b/lib/dateutil-stubs/zoneinfo/rebuild.pyi
@@ -0,0 +1,11 @@
+from _typeshed import Incomplete, StrOrBytesPath
+from collections.abc import Sequence
+from tarfile import TarInfo
+
+def rebuild(
+    filename: StrOrBytesPath,
+    tag: Incomplete | None = None,
+    format: str = "gz",
+    zonegroups: Sequence[str | TarInfo] = [],
+    metadata: Incomplete | None = None,
+) -> None: ...
diff --git a/lib/dateutil/__init__.py b/lib/dateutil/__init__.py
index 0defb82e..a2c19c06 100644
--- a/lib/dateutil/__init__.py
+++ b/lib/dateutil/__init__.py
@@ -1,4 +1,6 @@
 # -*- coding: utf-8 -*-
+import sys
+
 try:
     from ._version import version as __version__
 except ImportError:
@@ -6,3 +8,17 @@ except ImportError:
 
 __all__ = ['easter', 'parser', 'relativedelta', 'rrule', 'tz',
            'utils', 'zoneinfo']
+
+def __getattr__(name):
+    import importlib
+
+    if name in __all__:
+        return importlib.import_module("." + name, __name__)
+    raise AttributeError(
+        "module {!r} has not attribute {!r}".format(__name__, name)
+    )
+
+
+def __dir__():
+    # __dir__ should include all the lazy-importable modules as well.
+    return [x for x in globals() if x not in sys.modules] + __all__
diff --git a/lib/dateutil/_version.py b/lib/dateutil/_version.py
index b723056a..ddda9809 100644
--- a/lib/dateutil/_version.py
+++ b/lib/dateutil/_version.py
@@ -1,5 +1,4 @@
-# coding: utf-8
 # file generated by setuptools_scm
 # don't change, don't track in version control
-version = '2.8.2'
-version_tuple = (2, 8, 2)
+__version__ = version = '2.9.0.post0'
+__version_tuple__ = version_tuple = (2, 9, 0)
diff --git a/lib/dateutil/parser/isoparser.py b/lib/dateutil/parser/isoparser.py
index 5d7bee38..7060087d 100644
--- a/lib/dateutil/parser/isoparser.py
+++ b/lib/dateutil/parser/isoparser.py
@@ -72,7 +72,7 @@ class isoparser(object):
         Common:
 
         - ``YYYY``
-        - ``YYYY-MM`` or ``YYYYMM``
+        - ``YYYY-MM``
         - ``YYYY-MM-DD`` or ``YYYYMMDD``
 
         Uncommon:
diff --git a/lib/dateutil/relativedelta.py b/lib/dateutil/relativedelta.py
index a9e85f7e..cd323a54 100644
--- a/lib/dateutil/relativedelta.py
+++ b/lib/dateutil/relativedelta.py
@@ -48,7 +48,7 @@ class relativedelta(object):
             the corresponding arithmetic operation on the original datetime value
             with the information in the relativedelta.
 
-        weekday: 
+        weekday:
             One of the weekday instances (MO, TU, etc) available in the
             relativedelta module. These instances may receive a parameter N,
             specifying the Nth weekday, which could be positive or negative
diff --git a/lib/dateutil/rrule.py b/lib/dateutil/rrule.py
index b3203393..571a0d2b 100644
--- a/lib/dateutil/rrule.py
+++ b/lib/dateutil/rrule.py
@@ -182,7 +182,7 @@ class rrulebase(object):
     # __len__() introduces a large performance penalty.
     def count(self):
         """ Returns the number of recurrences in this set. It will have go
-            trough the whole recurrence, if this hasn't been done before. """
+            through the whole recurrence, if this hasn't been done before. """
         if self._len is None:
             for x in self:
                 pass
diff --git a/lib/dateutil/tz/tz.py b/lib/dateutil/tz/tz.py
index c67f56d4..61759144 100644
--- a/lib/dateutil/tz/tz.py
+++ b/lib/dateutil/tz/tz.py
@@ -34,7 +34,7 @@ except ImportError:
 from warnings import warn
 
 ZERO = datetime.timedelta(0)
-EPOCH = datetime.datetime.utcfromtimestamp(0)
+EPOCH = datetime.datetime(1970, 1, 1, 0, 0)
 EPOCHORDINAL = EPOCH.toordinal()
 
 
diff --git a/lib/dateutil/zoneinfo/dateutil-zoneinfo.tar.gz b/lib/dateutil/zoneinfo/dateutil-zoneinfo.tar.gz
index 524c48e1..1461f8c8 100644
Binary files a/lib/dateutil/zoneinfo/dateutil-zoneinfo.tar.gz and b/lib/dateutil/zoneinfo/dateutil-zoneinfo.tar.gz differ
diff --git a/requirements.txt b/requirements.txt
index 73b6e088..84451150 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 apscheduler==3.10.1
-arrow==1.2.3
+arrow==1.3.0
 backports.csv==1.0.7
 backports.functools-lru-cache==1.6.6
 backports.zoneinfo==0.2.1;python_version<"3.9"