Time Zone Converter
Convert a date+time from one IANA time zone to another.
Result
2026-05-05 14:30 America/New_York →
2026-05-05 19:30 Europe/London
-5.0h difference.
- Source2026-05-05 14:30 (America/New_York)
- Source UTC offsetUTC+4.0
- UTC instant2026-05-05 18:30
- Target UTC offsetUTC-1.0
- Target2026-05-05 19:30 (Europe/London)
- Hour difference-5.0
Step-by-step
- Find UTC instant matching 14:30 in America/New_York on 2026-05-05.
- Format that UTC instant in Europe/London → 2026-05-05 19:30.
How to use this calculator
- Enter date and time (24-hour HH:MM).
- Pick source and target time zones.
- Read converted time and offset difference.
About this calculator
Converts a wall-clock time in one IANA time zone to the equivalent wall-clock in another. Handles daylight saving time correctly via the Intl.DateTimeFormat API. The "hour difference" depends on date — DST shifts affect EU and US transitions in different weeks.
Frequently asked
Daylight saving time. NY-to-London is 5h in winter, 4h in spring (NY DST starts before London), 5h again summer, 4h again fall.
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