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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]
Port Arthur, Ontario (now part of Thunder Bay), was the first municipality in the world to enact daylight saving time, on July 1, 1908. [4] [5] (Germany later became the first country to adopt the time change, on April 30, 1916.) [6]
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]
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]
The Newfoundland Time Zone (NT) is a geographic region that keeps time by subtracting 3.5 hours from Coordinated Universal Time during standard time, resulting in UTC−03:30; or subtracting 2.5 hours during daylight saving time. [1] The clock time in this zone is based on the mean solar time of the meridian 52 degrees and 30 arcminutes west of ...
Daylight saving time (DST), also referred to as daylight saving(s), daylight savings time, daylight time (United States and Canada), or summer time (United Kingdom, European Union, and others), is the practice of advancing clocks to make better use of the longer daylight available during summer so that darkness falls at a later clock time.
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The Eastern Time Zone (ET) is a time zone encompassing part or all of 23 states in the eastern part of the United States, parts of eastern Canada, and the state of Quintana Roo in Mexico. Eastern Standard Time ( EST ) is five hours behind Coordinated Universal Time ( UTC−05:00 ).