diff --git a/lib/tzlocal/windows_tz.py b/lib/tzlocal/windows_tz.py
index 86ba807d..0d285037 100644
--- a/lib/tzlocal/windows_tz.py
+++ b/lib/tzlocal/windows_tz.py
@@ -104,6 +104,7 @@ win_tz = {'AUS Central Standard Time': 'Australia/Darwin',
  'Saratov Standard Time': 'Europe/Saratov',
  'Singapore Standard Time': 'Asia/Singapore',
  'South Africa Standard Time': 'Africa/Johannesburg',
+ 'South Sudan Standard Time': 'Africa/Juba',
  'Sri Lanka Standard Time': 'Asia/Colombo',
  'Sudan Standard Time': 'Africa/Khartoum',
  'Syria Standard Time': 'Asia/Damascus',
@@ -118,7 +119,7 @@ win_tz = {'AUS Central Standard Time': 'Australia/Darwin',
  'Turks And Caicos Standard Time': 'America/Grand_Turk',
  'US Eastern Standard Time': 'America/Indianapolis',
  'US Mountain Standard Time': 'America/Phoenix',
- 'UTC': 'Etc/GMT',
+ 'UTC': 'Etc/UTC',
  'UTC+12': 'Etc/GMT-12',
  'UTC+13': 'Etc/GMT-13',
  'UTC-02': 'Etc/GMT+2',
@@ -136,7 +137,8 @@ win_tz = {'AUS Central Standard Time': 'Australia/Darwin',
  'West Asia Standard Time': 'Asia/Tashkent',
  'West Bank Standard Time': 'Asia/Hebron',
  'West Pacific Standard Time': 'Pacific/Port_Moresby',
- 'Yakutsk Standard Time': 'Asia/Yakutsk'}
+ 'Yakutsk Standard Time': 'Asia/Yakutsk',
+ 'Yukon Standard Time': 'America/Whitehorse'}
 
 # Old name for the win_tz variable:
 tz_names = win_tz
@@ -166,7 +168,7 @@ tz_win = {'Africa/Abidjan': 'Greenwich Standard Time',
  'Africa/Gaborone': 'South Africa Standard Time',
  'Africa/Harare': 'South Africa Standard Time',
  'Africa/Johannesburg': 'South Africa Standard Time',
- 'Africa/Juba': 'E. Africa Standard Time',
+ 'Africa/Juba': 'South Sudan Standard Time',
  'Africa/Kampala': 'E. Africa Standard Time',
  'Africa/Khartoum': 'Sudan Standard Time',
  'Africa/Kigali': 'South Africa Standard Time',
@@ -234,8 +236,8 @@ tz_win = {'Africa/Abidjan': 'Greenwich Standard Time',
  'America/Creston': 'US Mountain Standard Time',
  'America/Cuiaba': 'Central Brazilian Standard Time',
  'America/Curacao': 'SA Western Standard Time',
- 'America/Danmarkshavn': 'UTC',
- 'America/Dawson': 'Pacific Standard Time',
+ 'America/Danmarkshavn': 'Greenwich Standard Time',
+ 'America/Dawson': 'Yukon Standard Time',
  'America/Dawson_Creek': 'US Mountain Standard Time',
  'America/Denver': 'Mountain Standard Time',
  'America/Detroit': 'Eastern Standard Time',
@@ -345,14 +347,14 @@ tz_win = {'Africa/Abidjan': 'Greenwich Standard Time',
  'America/Tortola': 'SA Western Standard Time',
  'America/Vancouver': 'Pacific Standard Time',
  'America/Virgin': 'SA Western Standard Time',
- 'America/Whitehorse': 'Pacific Standard Time',
+ 'America/Whitehorse': 'Yukon Standard Time',
  'America/Winnipeg': 'Central Standard Time',
  'America/Yakutat': 'Alaskan Standard Time',
  'America/Yellowknife': 'Mountain Standard Time',
- 'Antarctica/Casey': 'Singapore Standard Time',
+ 'Antarctica/Casey': 'Central Pacific Standard Time',
  'Antarctica/Davis': 'SE Asia Standard Time',
  'Antarctica/DumontDUrville': 'West Pacific Standard Time',
- 'Antarctica/Macquarie': 'Central Pacific Standard Time',
+ 'Antarctica/Macquarie': 'Tasmania Standard Time',
  'Antarctica/Mawson': 'West Asia Standard Time',
  'Antarctica/McMurdo': 'New Zealand Standard Time',
  'Antarctica/Palmer': 'SA Eastern Standard Time',
@@ -501,7 +503,7 @@ tz_win = {'Africa/Abidjan': 'Greenwich Standard Time',
  'Canada/Newfoundland': 'Newfoundland Standard Time',
  'Canada/Pacific': 'Pacific Standard Time',
  'Canada/Saskatchewan': 'Canada Central Standard Time',
- 'Canada/Yukon': 'Pacific Standard Time',
+ 'Canada/Yukon': 'Yukon Standard Time',
  'Chile/Continental': 'Pacific SA Standard Time',
  'Chile/EasterIsland': 'Easter Island Standard Time',
  'Cuba': 'Cuba Standard Time',