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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]
Each zone line for a zone specifies, for a range of date and time, the offset to UTC for standard time, the name of the set of rules that govern daylight saving time (or a hyphen if standard time always applies), the format for time zone abbreviations, and, for all but the last zone line, the date and time at which the range of date and time ...
The COFF file header stores the date and time that the object file was created as a 32-bit binary integer, representing the number of seconds since the Unix epoch, 1 January 1970 00:00:00 UTC. Dates occurring after 19 January 2038 cannot be stored in this format, resulting in an instance of the year 2038 problem. [4]: 11–4
Tz database#Names of time zones describes the rules for constructing time zone names for the database. Category:Tz database is a category that includes a pile of individual Wikipedia pages for individual zone names and redirects to locations. List of tz database time zones gives a list of zone names. Guy Harris 00:54, 7 October 2011 (UTC)
ISO 8601 is an international standard covering the worldwide exchange and communication of date and time-related data.It is maintained by the International Organization for Standardization (ISO) and was first published in 1988, with updates in 1991, 2000, 2004, and 2019, and an amendment in 2022. [1]
The late cutoff is known as the Year 2038 problem and has the potential to cause issues as the date approaches, as dates beyond the 2038 cutoff would wrap back around to the start of the representable range in 1901. [31]: 60 Date range cutoffs are not an issue with 64-bit representations of Unix time, as the effective range of dates ...
Date: The date and time at which the message was originated (in "HTTP-date" format as defined by RFC 9110: HTTP Semantics, section 5.6.7 "Date/Time Formats"). Date: Tue, 15 Nov 1994 08:12:31 GMT: Permanent RFC 9110: Expect: Indicates that particular server behaviors are required by the client. Expect: 100-continue: Permanent RFC 9110: Forwarded
National standard format is yyyy-mm-dd. [161] dd.mm.yyyy format is used in some places where it is required by EU regulations, for example for best-before dates on food [162] and on driver's licenses. d/m format is used casually, when the year is obvious from the context, and for date ranges, e.g. 28-31/8 for 28–31 August.