E.U. Summer Time Starting / Ending Dates (Valid From 2002)
Year
European Union (E.U.) Summer Time Start / End Dates For 2017

Starts on the last Sunday in March and ends on the last Sunday in October
Summer Time Starting Date

2017      March
SunMonTueWedThuFriSat
      1 2 3 4
5 6 7 8 9 10 11
12 13 14 15 16 17 18
19 20 21 22 23 24 25
26 27 28 29 30 31  

Summer Time Ending Date

2017      October
SunMonTueWedThuFriSat
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20 21
22 23 24 25 26 27 28
29 30 31        

Duration = 217 days = 31 weeks

Since 2002 the European Union (E.U.) summer time rule has been standardized and implemented from the last Sunday in March to the last Sunday in October.  The duration of Summer Time varies between 210 days (30 weeks) in some years and 217 days (31 weeks) in others.  On transition either way, the clocks in all time zones change simultaneously at 01:00 UTC.


Jay Tanner - PHP Science Labs - 2017 - v3.3