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An hour of syndicated programming time (between 7:00 and 8:00 p.m. in the Eastern and Pacific time zones) is lost in the Central and Mountain time zones since network primetime in those areas starts at 7:00 p.m., forcing stations in Mountain or Central time (or in parts of both zones) to choose between airing their 6:00 p.m. newscast and ...
The divisions between time zones are based on proposals by Scottish Canadian railway engineer Sandford Fleming, who pioneered the use of the 24-hour clock, the world's time zone system, and a standard prime meridian. [2]
The tz database partitions the world into regions where local clocks all show the same time. This map was made by combining version 2023d with OpenStreetMap data, using open source software. [1] This is a list of time zones from release 2025a of the tz database. [2]
A similar National Research Council Time Signal was broadcast by the Canadian Broadcasting Corporation (CBC) radio services daily at noon ET on Radio-Canada's Première Chaîne, and 1 p.m. ET on CBC Radio One. Its last broadcast was on October 9, 2023.
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The Government of Canada specifies the ISO 8601 format for all-numeric dates (YYYY-MM-DD; for example, 2025-01-31). [2] It recommends writing the time using the 24-hour clock (00:42) for maximum clarity in both Canadian English and Canadian French, [3] but also allows the 12-hour clock (12:42 a.m.) in English. [4]
Clock towers in Canada (18 P) D. Daylight saving time in Canada (6 P) ... Effects of time zones on North American broadcasting; M. Mountain Time Zone; N. Newfoundland ...
In the regions of Canada that use daylight saving time, it begins on the second Sunday of March at 2 a.m. and ends on the first Sunday in November at 2 a.m. As a result, daylight saving time lasts in Canada for a total of 34 weeks (238 days) every year, about 65 percent of the entire year.