Central European Time (CET) is a standard time observed in Central as well as parts of Western and Southeast Europe, which is one hour ahead of Coordinated Universal Time (UTC). The time offset from UTC can be written as UTC+01:00. It covers most of continental Europe and it has been adopted by several African countries where it is known under various other names.

CET is also known as Middle European Time (MET, German: MEZ) and by colloquial names that reference major European cities such as Amsterdam Time, Berlin Time, Brussels Time, Budapest Time, Madrid Time, Paris Time, Stockholm Time, Rome Time, Prague time, Warsaw Time or Romance Standard Time (RST).

The 15th meridian east is the central axis per UTC+01:00 in the world system of time zones.

As of 2023, all member countries of the European Union observe summer time (daylight saving time), from the last Sunday in March to the last Sunday in October. Countries within the CET area switch to Central European Summer Time (CEST, UTC+02:00) for the summer. The next change to CET is scheduled for midnight of 24 October 2026.

In Africa, UTC+01:00 is called West Africa Time (WAT), where it is used by several countries, year round. Algeria, Morocco, and Tunisia also refer to it as Central European Time.

As of 2017, Central European Time is currently used in Albania, Andorra, Austria, Belgium, Bosnia and Herzegovina, Croatia, Czechia, Denmark, France, Germany, Gibraltar (British territory), Hungary, Italy, Kosovo (partially recognised as an independent country), Liechtenstein, Luxembourg, Malta, Monaco, Montenegro, Netherlands, North Macedonia, Norway, Poland, San Marino, Serbia, Slovakia, Slovenia, Spain (except the Canary Islands), Sweden, Switzerland and Vatican City.

After World War II Monaco, Andorra and Gibraltar implemented CET.

Portugal used CET in the years 1966–1976 and 1992–1996.