CET stands for Central European Standard Time. It is always UTC+1.
CET is standard time. While daylight saving time is in effect, the same areas use CEST (UTC+2) instead.
Right now Paris uses CET.
Where CET is used
Albania, Algeria, Andorra, Austria, Belgium, Bosnia & Herzegovina, Croatia, Czechia, Denmark, France, Germany, Hungary, Italy, Liechtenstein, Luxembourg, Malta, Monaco, Montenegro, Netherlands, North Macedonia, Norway, Poland, San Marino, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Tunisia, Vatican City.
In some of these countries CET is used only in part of the country or only part of the year.