World clock
Compare the current time, date and UTC offset in cities around the world.
Your inputs
Locations and display
How it works
- Local start = UTC instant + UTC offset
- Difference from reference = UTC offset −
- Worked example: At 23:30 UTC on 2026-01-15, Tokyo is already on the following calendar day. Read both date and time; comparing the hour alone hides the day change.
- 2026-01-15 23:30 UTC → 2026-01-16 08:30 (Asia/Tokyo).
Input and formula key
Your result
Current time uses your device clock; time zone rules come from your browser. Locations are not saved.
Your browser has outdated rules for a selected time zone. Update your browser and operating system; verify important dates against current local rules.
Assumptions and limitations
Time zone rules come from your browser and can lag legal changes. Future dates are predictions under those rules. City names and mappings use a reviewed GeoNames subset (CC BY 4.0); no location detection or saving. Dates before 1970 have limited historical reliability.
Sources
- IANA — time zone database and accuracy Sources reviewed: 2026-10-07
- GeoNames — city data, CC BY 4.0 (curated and modified) Sources reviewed: 2026-10-07
- Creative Commons — Attribution 4.0 license Sources reviewed: 2026-10-07
