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Such designations can be ambiguous; for example, "CST" can mean China Standard Time (UTC+8), Cuba Standard Time (UTC−5), and (North American) Central Standard Time (UTC−6), and it is also a widely used variant of ACST (Australian Central Standard Time, UTC+9:30). Such designations predate both ISO 8601 and the internet era; in an earlier ...
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 2024a of the tz database. [ 2]
On the other hand, an alphanumeric date in month-day-year format instead uses spacing and a comma between the day and year. The day-month-year variant likewise does not necessarily require a comma between the month and year. Below are date format variations typically used in the Philippines: Standard: August 23, 2024 or month day, year.
UTC−08:00 (Zone 4 or Northwest Zone) – State of Baja California. UTC−07:00 (Zone 3 or Pacific Zone) – States of Baja California Sur, Chihuahua, Nayarit, Sinaloa and Sonora. UTC−06:00 (Zone 2 or Central Zone) – Most of Mexico. UTC−05:00 (Zone 1 or Southeast Zone) – State of Quintana Roo. Time in Mexico. Chile.
Philippine Standard Time: April 12, 1954 – June 30, 1954 GMT+09:00: Philippine Daylight Saving Time: July 1, 1954 – March 21, 1978 GMT/UTC+08:00 [note 3] Philippine Standard Time: March 22, 1978 – September 20, 1978 UTC+09:00: Philippine Daylight Saving Time: September 21, 1978 – May 20, 1990 UTC+08:00: Philippine Standard Time
Greenwich Mean Time is defined in law as standard time in the following countries and areas, which also advance their clocks one hour (GMT+1) in summer. United Kingdom, where the summer time is called British Summer Time ( BST) Ireland, where it is called Winter Time, [ 22] changing to Standard Time in summer. [ 21]
During British Summer Time ( BST ), civil time in the United Kingdom is advanced one hour forward of Greenwich Mean Time (GMT), in effect changing the time zone from UTC±00:00 to UTC+01:00, so that mornings have one hour less daylight, and evenings one hour more. [ 1][ 2] BST begins at 01:00 GMT every year on the last Sunday of March and ends ...
The Atlantic Time Zone is a geographical region that keeps standard time—called Atlantic Standard Time ( AST )—by subtracting four hours from Coordinated Universal Time ( UTC ), resulting in UTC−04:00. AST is observed in parts of North America and some Caribbean islands. During part of the year, some portions of the zone observe daylight ...