Age Calculator
Calculate calendar age in years, months, and days on a date you choose.
Date & Time · FREE TO USE
Time Zone Converter
Convert a dated local time between IANA time zones, with explicit daylight-saving choices.
02EXAMPLE RESULT
Destination local time
2026-10-29T13:00:00
Destination zoneEurope/London
Destination UTC offset+00:00
Source UTC offset-04:00
UTC instant2026-10-29T13:00:00Z
Results update as you type. Calculate adds a snapshot to your history.
How this calculation works
Time zones depend on the date. Repeated clock times require an explicit earlier or later choice. A time skipped when clocks move forward is rejected. Zone rules come from the runtime’s IANA time-zone data; future government changes may require a runtime update.
Dated source wall time → a unique instant → destination wall time.
Your calculation, step by step
- Interpret 2026-10-29T09:00:00 in America/New_York.
- Convert the same instant to the destination zone.
A worked example
October 29, 2026 at 09:00 in New York is 13:00 in London.
Work through an example.
Inspect the assumptions and limits before applying a result.