Collective
Genealogical Database - Timezones
| Greenwich Mean Time (GMT): | GMT+/-0000 United Kingdom of Great Britain and Northern Ireland |
| British Summer Time (BST): | GMT+0100 United Kingdom of Great Britain and Northern Ireland |
| Newfoundland Standard Time (NST): | GMT-0330 Newfoundland and Labrador |
| Newfoundland Daylight Time (NDT): | GMT-0230 Newfoundland and Labrador |
| Atlantic Standard Time (AST): | GMT-0400 New Brunswick, Nova Scotia, Prince Edward Island |
| Atlantic Daylight Time (ADT): | GMT-0300 New Brunswick, Nova Scotia, Prince Edward Island |
| Eastern Standard Time (EST): | GMT-0500 Ontario, Québec |
| Eastern Daylight Time (EDT): | GMT-0400 Ontario, Québec |
| Central Standard Time (CST): | GMT-0600 Saskatchewan, Manitoba, eastern Nebraska |
| Central Daylight Time (CDT): | GMT-0500 Manitoba, eastern Nebraska |
| Mountain Standard Time (MST): | GMT-0700 Alberta, western Nebraska |
| Mountain Daylight Time (MDT): | GMT-0600 Alberta, western Nebraska |
| Pacific Standard Time (PST): | GMT-0800 British Columbia |
| Pacific Daylight Time (PDT): | GMT-0700 British Columbia |