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It is the transition to summer time in the countries of the European Community. We’ll have to put our clocks forward one hour.
Thus, at 1:00 a.m. UT, your watch, which indicated 2:00 a.m., local time, should indicate 3:00 a.m. To obtain universal time (UT), you previously had to subtract one hour from local time. It will now take two hours off.