Highlighted rows fall within 09:00–18:00 in both places: 7 shared working hours.
How many hours is GMT behind CEST?
As abbreviations, CEST is always 2 hours ahead of GMT: GMT is UTC+0 and CEST is UTC+2. To convert, add 2 hours.
When the GMT to CEST time difference changes
For most of the year CEST is 2 hours ahead of GMT. From 25 October to 31 December 2026, CEST is 1 hour ahead of GMT instead, because the two places change their clocks on different dates. Meetings booked by the usual gap land an hour off in those weeks.
Dates
CEST vs GMT
Length
29 March 2026 to 24 October 2026
2 hours ahead
210 days
25 October 2026 to 31 December 2026
1 hour ahead
68 days
1 January 2027 to 27 March 2027
1 hour ahead
86 days
28 March 2027 to 30 October 2027
2 hours ahead
217 days
31 October 2027 to 31 December 2027
1 hour ahead
62 days
Calling hours for GMT and CEST
When CEST is 2 hours ahead of GMT: 6 shared office hours, 09:00 to 15:00 in GMT (11:00 to 17:00 in CEST).
When CEST is 1 hour ahead of GMT: 7 shared office hours, 09:00 to 16:00 in GMT (10:00 to 17:00 in CEST).
Frequently asked questions about GMT and CEST time
How many hours ahead is CEST of GMT?
CEST (UTC+2) is 2 hours ahead of GMT (UTC+0).
Does the time difference between GMT and CEST change?
Yes. It is usually 2 hours ahead, but changes when one side moves its clocks: 1 hour ahead from 25 October to 31 December 2026; 1 hour ahead from 1 January to 27 March 2027.