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compile using: /std:c++latestĬonst auto& my_tzdb = get_tzdb() // get the IANA time zone databaseĪuto& links = my_tzdb.

Administrative zones have a special area: Etc. For example, America/Montreal, Africa/Tunis, Asia/Tokyo, and Pacific/Auckland. Another way to check the time zone is to view the path the symlink points to using the ls command: ls -l /etc/localtime lrwxrwxrwx 1 root root 27 Dec 3 16:29 /etc/localtime -> /usr/share/zoneinfo/Etc/UTC Changing the Time Zone in Linux Before changing the time zone, you’ll need to find out the long name of the time zone you want to use. For most zones, the Area is a continent and the Location is a major city. The following example displays the names of each time_zone_link in the IANA time zone database. 24 Etc/UTC You are missing Area code defined in the official tz database. string_view target() const noexcept // Since C++20 Gets the name of the time_zone that this time_zone_link is an alternative name for.

Gets the alternate name for the time zone. Time-zone data is only available for Windows 10 version 1903/19H1 and later, and Windows Server 2022 and later. The target name isn't part of the equality check.Ĭompare this time_zone_link against another time_zone_link. The name of the time_zone that this time_zone_link is an alternative name for.ĭetermine whether two time_zone_link objects have the same name. Members Public member functions and function templates Name For more information, see Issue #1786 on the Microsoft STL GitHub repo. Prior to 1972, this time was called Greenwich Mean Time (GMT) but is now referred to as Coordinated Universal Time or Universal Time Coordinated (UTC). We don't supply the "Eastern War Time EWT" time zone at this time. For example, "America/Nuuk" is returned instead of "America/Godthab" ( "America/Nuuk" was renamed "America/Godthab" in April 2020). Time difference between Etc/UTC and America/Chicago is 5:0 hours ie., America/Chicago time is always 5:0 hours behind Etc/UTC. Since Coordinated Universal Time or UTC is a standard, there is no time zone, territory or country that uses it for a local time. Etc/UTC is a UTC +00:00 timezone offset where as America/Chicago is a UTC -5:0 timezone offset. In Microsoft's implementation, time zone data can differ in some cases from the Internet Assigned Numbers Authority (IANA) time zone database. Enter any time in Etc/UTC and find the corresponding asia/kabul time using this Time Calculator. Using those functions results in undefined behavior, which is why the move constructor and assignment operator aren't listed here. This time zone does not change for daylight savings. Search for a city to find the local time. Get an instance via get_tzdb().links, as shown in the example at the end of this topic.Īlthough this type has a default move constructor and move assignment operator, it isn't copyable because only const access is provided to this type. The time and date in this time zone is: 7:04 AM on Monday, Aug 15, 2022.

Time_zone_link instances are created when the time zone database is initialized. Syntax class time_zone_link // Since C++20 For example, the time zone 8 hours ahead of GMT that is used in China and Western Australia (among other places) is actually Etc/GMT-8 in this database. Specifies an alternative name for a time_zone.