UTC does not change with a change of seasons, but local time or civil time may change if a time zone jurisdiction observes daylight saving time or summer time. For example, UTC is 5 hours ahead of local time on the east coast of the United States during winter, but 4 hours ahead during summer.

Does EU have summer time?

Time Change in Europe

According to the current EU rules, DST starts on the last Sunday of March and ends on the last Sunday of October.

Which countries use summer time?

All European Union countries and many European non-members continue to make the switch twice a year. Outside of Europe and North America, changing the clocks is also practiced in Iran, most of Mexico, Argentina, Paraguay, Cuba, Haiti, the Levant, New Zealand and parts of Australia.