diff --git a/lib/timezonedata/exchangezones.php b/lib/timezonedata/exchangezones.php
index 89bddc27c..2dd7267bd 100644
--- a/lib/timezonedata/exchangezones.php
+++ b/lib/timezonedata/exchangezones.php
@@ -74,19 +74,26 @@
     'Greenland' => 'America/Godthab',
     'Newfoundland' => 'America/St_Johns',
     'Atlantic Time (Canada)' => 'America/Halifax',
+    'Atlantic Time' => 'America/Halifax',
     'Caracas, La Paz' => 'America/Caracas',
     'Santiago' => 'America/Santiago',
     'Bogota, Lima, Quito' => 'America/Bogota',
     'Eastern Time (US & Canada)' => 'America/New_York',
+    'Eastern Time' => 'America/New_York',
     'Indiana (East)' => 'America/Indiana/Indianapolis',
+    'Indiana' => 'America/Indiana/Indianapolis',
     'Central America' => 'America/Guatemala',
     'Central Time (US & Canada)' => 'America/Chicago',
+    'Central Time' => 'America/Chicago',
     'Mexico City, Tegucigalpa' => 'America/Mexico_City',
     'Saskatchewan' => 'America/Edmonton',
     'Arizona' => 'America/Phoenix',
     'Mountain Time (US & Canada)' => 'America/Denver', // Best guess
+    'Mountain Time' => 'America/Denver', // Best guess
     'Pacific Time (US & Canada)' => 'America/Los_Angeles', // Best guess
+    'Pacific Time' => 'America/Los_Angeles', // Best guess
     'Pacific Time (US & Canada); Tijuana' => 'America/Los_Angeles', // Best guess
+    'Pacific Time; Tijuana' => 'America/Los_Angeles', // Best guess
     'Alaska' => 'America/Anchorage',
     'Hawaii' => 'Pacific/Honolulu',
     'Midway Island, Samoa' => 'Pacific/Midway',