The Canadian Sir Sandford Fleming first proposed time

The Canadian Sir Sandford Fleming first proposed time zones for the entire world in 1876, and Canada, being a continental country, is covered coast to coast with multiple zones. Canada uses the 12-hour clock system, however the 24-hour clock system is used in the provinces of Quebec and New Brunswick where French is an official language and this clock system is used with that language; and ambiguity must be avoided, such as train or airline schedules when given in both English and French, because they will be inidicated in each clock system. Daylight Saving Time, when clocks are moved forward by one hour, is observed in most of the country from 2AM on the second Sunday in March until 2AM on the second Sunday in November; during this time, for example, British Columbia is observing GMT-7 while Alberta is observing GMT-6.
GMT-8 Pacific Time (Yukon, British Columbia)
GMT-7 Mountain Time (Alberta, Northwest Territories, Nunavut)
GMT-6 Central Time (Saskatchewan, Manitoba, Ontario)
GMT-5 Eastern Time (Ontario, Quebec)
GMT-4 Atlantic Time (Nova Scotia, New Brunswick, Prince Edward Island)
GMT-3.5 Newfoundland Time (Newfoundland and Labrador)