Is daylight saving time in effect?
We compare your current timezone offset with the standard (winter) offset to see if daylight saving time is active.
Results are estimates for information only. Privacy · Terms · Guides
Daylight saving time
How we detect DST
We compare your current timezone offset with the standard (winter) offset for that zone. If they differ, daylight saving time is likely in effect for your device timezone.
Regions without DST always look “standard.” The result follows OS timezone data, not IP city guesses.
Conflicts and UTC
If a website disagrees, it may be using a different zone database or a fixed offset. UTC itself does not observe DST; local offsets change around it.
Update the OS when governments change DST rules so both this page and your calendar stay aligned.
Learn more
Guide: timezone, UTC, and Unix time.
Get your related information
Frequently Asked Questions
What is DST?
Daylight saving time shifts clocks forward in warmer months in regions that observe it.
How do you detect it?
If your current offset is less than the standard offset for the year, DST is considered active.
Regions without DST
If your timezone never observes DST, this will stay on standard time year-round.
Why might it disagree with a website?
Rules change by government policy. Keep your OS timezone database updated.
UTC and DST
UTC itself does not observe DST. Only local zones do.