Daylight saving time is also called summer time or daylight savings time. When DST is not observed, it is called standard time, normal time or winter time. On Sunday, 25 March at 02:00 forward your clock to 03:00.
More Light in the Evening
In local time, sunrise and sunset will be about 1 hour later on Sunday, March 26, 2017 than the day before, resulting in more daylight in the evening.
Changes at the Same Time
European countries synchronize their DST, which starts on the last Sunday of March and ends on the last Sunday of October.
Participating countries are:
The European Union (EU), including Bulgaria, France, Germany, Italy, Hungary, Poland, Spain, and the United Kingdom.
Most other European countries, including Norway and Switzerland.
European Countries Without DST:
Armenia, Belarus, Georgia, Iceland, Russia, and Turkey don’t use DST and remain on standard time all year.
More from the source: timeanddate.com