Central European Summer Time

Time zones of Europe in relation to UTC:

blue	Western European Time (UTC+0) Western European Summer Time (UTC+1)
light blue	Western European Time (UTC+0)
red	Central European Time (UTC+1) Central European Summer Time (UTC+2)
yellow	Eastern European Time (UTC+2) Eastern European Summer Time (UTC+3)
orange	Kaliningrad Time (UTC+3)
green	Further-eastern European Time (UTC+3), a.k.a. Moscow Time

Light colours indicate countries that do not observe summer time.

Central European Summer Time is the name for a time zone. Some of the countries that have Central European Time shift their clocks forward one hour, during the summer months. And shift it one hour backwards during winter months.