Choose a timezone to see whether it currently observes daylight saving time and when its next clock change happens.
Checked locally in your browser using its built-in timezone data — nothing is sent to our server.
Observes DST?
Current UTC offset
Next transition
How This Tool Works
Uses your browser’s own built-in timezone database (the same one real timezone libraries use) to check the UTC offset on each day of the year — rather than re-implementing each country’s specific DST transition rules, which vary and change over time, this asks the browser directly what it actually knows.