Central European Time (CET) is a standard time of Central, and parts of Western Europe, which is one hour ahead of Coordinated Universal Time (UTC). The time offset from UTC can be written as UTC+01:00. It is used in most parts of Europe and in a few North African countries. CET is also known as Middle European Time and by colloquial names such as Amsterdam Time, Berlin Time, Brussels Time, Budapest Time, Madrid Time, Paris Time, Rome Time, Prague time, Warsaw Time or Romance Standard Time (RST).
Summer time in Europe is the variation of standard clock time that is applied in most European countries in the period between spring and autumn, during which clocks are advanced by one hour from the time observed in the rest of the year, with a view to making the most efficient use of seasonal daylight. It corresponds to the notion and practice of daylight saving time (DST) to be found in some other parts of the world.
Central European Summer Time, sometimes referred to as Central European Daylight Time (CEDT), is the standard clock time observed during the period of summer daylight-saving in those European countries which observe Central European Time during the other part of the year. It corresponds to UTC+02:00, which makes it the same as Eastern European Time, Central Africa Time, South African Standard Time, Egypt Standard Time and Kaliningrad Time in Russia.
The tz database is a collaborative compilation of information about the world's time zones and rules for observing daylight saving time, primarily intended for use with computer programs and operating systems. Paul Eggert has been its editor and maintainer since 2005, with the organizational backing of ICANN. The tz database is also known as tzdata, the zoneinfo database or the IANA time zone database, and occasionally as the Olson database, referring to the founding contributor, Arthur David Olson.
Switzerland uses Central European Time (CET) during the winter as standard time, which is one hour ahead of Coordinated Universal Time (UTC+01:00), and Central European Summer Time (CEST) during the summer as daylight saving time, which is two hours ahead of Coordinated Universal Time (UTC+02:00).
Bosnia and Herzegovina uses a single time zone, denoted as Central European Time. It also observes summer time, shifting to Central European Summer Time.
Time in the Kingdom of the Netherlands is denoted by Central European Time during the winter as standard time in the Netherlands, which is one hour ahead of coordinated universal time (UTC+01:00), and Central European Summer Time (CEST) during the summer as daylight saving time, which is two hours ahead of coordinated universal time (UTC+02:00). The Caribbean Netherlands – which consist of the islands of Bonaire, Sint Eustatius and Saba – all observe Atlantic Standard Time (AST) year-round, which is four hours behind coordinated universal time (UTC−04:00).
In Slovakia, the standard time is Central European Time (UTC+01:00). Daylight saving time is observed from the last Sunday in March to the last Sunday in October. This is shared with several other EU member states.
In Sweden, the standard time is Central European Time. Daylight saving time is observed from the last Sunday in March to the last Sunday in October. Sweden adopted CET in 1900.
In Austria, the standard time is Central European Time. Daylight saving time is observed from the last Sunday in March to the last Sunday in October.
In Albania, the standard time is Central European Time. Daylight saving time, which moves one hour ahead to Central European Summer Time, is observed from the last Sunday in March to the last Sunday in October. Albania adopted CET in 1914.
In Montenegro, the standard time is Central European Time. Daylight saving time is observed from the last Sunday in March to the last Sunday in October. Montenegro has consistently used CET since it gained independence in 2006.
In Andorra, the standard time is Central European Time. Daylight saving time is observed from the last Sunday in March to the last Sunday in October. Andorra adopted CET after WWII.
Time in Poland is given by Central European Time. Daylight saving time, which moves an hour ahead, is observed from the last Sunday in March to the last Sunday in October. This is shared with several other EU member states.
In Slovenia, the standard time is Central European Time. Daylight saving time is observed from the last Sunday in March to the last Sunday in October. This is shared with several other EU member states.
In North Macedonia, the standard time is Central European Time. Daylight saving time is observed from the last Sunday in March to the last Sunday in October. This is shared with several other EU member states.
In San Marino, the standard time is Central European Time. Daylight saving time is observed from the last Sunday in March to the last Sunday in October. This is shared with several other EU member states.
In Luxembourg, the standard time is Central European Time. Daylight saving time is observed from the last Sunday in March to the last Sunday in October.
In Kosovo, the standard time is Central European Time. Daylight saving time, which is one hour ahead, is observed from the last Sunday in March to the last Sunday in October.
In Liechtenstein, the standard time is Central European Time. Daylight saving time is observed from the last Sunday in March to the last Sunday in October. Liechtenstein adopted CET in 1894.
