Highlighted rows fall within 09:00–18:00 in both places: 4 shared working hours.
How many hours is CET behind MMT?
As abbreviations, MMT is always 5.5 hours ahead of CET: CET is UTC+1 and MMT is UTC+6:30. To convert, add 5.5 hours.
When the CET to MMT time difference changes
For most of the year MMT is 4.5 hours ahead of CET. From 25 October to 31 December 2026, MMT is 5.5 hours ahead of CET 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
MMT vs CET
Length
25 October 2026 to 31 December 2026
5.5 hours ahead
68 days
1 January 2027 to 27 March 2027
5.5 hours ahead
86 days
28 March 2027 to 30 October 2027
4.5 hours ahead
217 days
31 October 2027 to 31 December 2027
5.5 hours ahead
62 days
When CET and MMT are both at work
When MMT is 4.5 hours ahead of CET: 4 shared office hours, 09:00 to 13:00 in CET (13:30 to 17:30 in MMT).
When MMT is 5.5 hours ahead of CET: 3 shared office hours, 09:00 to 12:00 in CET (14:30 to 17:30 in MMT).
Frequently asked questions about CET and MMT time
How many hours ahead is MMT of CET?
MMT (UTC+6:30) is 5.5 hours ahead of CET (UTC+1).
Does the time difference between CET and MMT change?
Yes. It is usually 4.5 hours ahead, but changes when one side moves its clocks: 5.5 hours ahead from 25 October to 31 December 2026; 5.5 hours ahead from 1 January to 27 March 2027.