Improve timezone fallback

Tautulli.py

@@ -110,12 +110,12 @@ def main():
                       verbose=plexpy.VERBOSE)
 
     try:
-        plexpy.SYS_TIMEZONE = str(tzlocal.get_localzone())
-        plexpy.SYS_UTC_OFFSET = datetime.datetime.now(pytz.timezone(plexpy.SYS_TIMEZONE)).strftime('%z')
+        plexpy.SYS_TIMEZONE = tzlocal.get_localzone()
     except (pytz.UnknownTimeZoneError, LookupError, ValueError) as e:
         logger.error("Could not determine system timezone: %s" % e)
-        plexpy.SYS_TIMEZONE = 'Unknown'
-        plexpy.SYS_UTC_OFFSET = '+0000'
+        plexpy.SYS_TIMEZONE = pytz.UTC
+
+    plexpy.SYS_UTC_OFFSET = datetime.datetime.now(plexpy.SYS_TIMEZONE).strftime('%z')
 
     if os.getenv('TAUTULLI_DOCKER', False) == 'True':
         plexpy.DOCKER = True

data/interfaces/default/configuration_table.html

@@ -73,7 +73,7 @@ DOCUMENTATION :: END
         </tr>
         <tr>
             <td>System Timezone:</td>
-            <td>${plexpy.SYS_TIMEZONE} (${'UTC{}'.format(plexpy.SYS_UTC_OFFSET)})
+            <td>${plexpy.SYS_TIMEZONE.zone} (${'UTC{}'.format(plexpy.SYS_UTC_OFFSET)})
         </tr>
         <tr>
             <td>Python Version:</td>

plexpy/__init__.py

@@ -33,6 +33,7 @@ import cherrypy
 from apscheduler.schedulers.background import BackgroundScheduler
 from apscheduler.triggers.interval import IntervalTrigger
 from UniversalAnalytics import Tracker
+import pytz
 
 import activity_handler
 import activity_pinger
@@ -160,7 +161,7 @@ def initialize(config_file):
             ' - {}'.format(common.PLATFORM_LINUX_DISTRO) if common.PLATFORM_LINUX_DISTRO else ''
         ))
         logger.info(u"{} (UTC{})".format(
-            plexpy.SYS_TIMEZONE, plexpy.SYS_UTC_OFFSET
+            plexpy.SYS_TIMEZONE.zone, plexpy.SYS_UTC_OFFSET
         ))
         logger.info(u"Python {}".format(
             sys.version