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Time Zone Calculator

Convert a date and time between time zones, including daylight saving.

Time in London

November 1, 2026 at 5:00 PM

From these numbers

November 1, 2026 at 12:00 PM in New York (UTC-5) is November 1, 2026 at 5:00 PM in London (UTC+0).

Times use the time zone data built into your browser, including daylight saving. When a local time happens twice, the result uses the earlier one. When a local time is skipped, there is no conversion.

Learn more

How this calculator works and what to know before using it

What this calculator does

Converts a date and time from one time zone to another, using the time zone data in your browser.

How to use it

  1. Enter the date and time.
  2. Choose the starting zone and the destination zone.
  3. Read the converted time and each zone's offset from UTC.

Formula used

IANA time zone conversion

The local time is resolved to a single instant, then formatted in the destination zone. A skipped hour has no instant. When a time happens twice, the earlier instant is used.

Source. The browser resolves the civil time with the IANA time zone data it ships. A skipped hour has no converted time. When the same clock time happens twice, the earlier instant is used. Internet Assigned Numbers Authority, Time Zone Database. IANA time zone database.

Updated November 1, 2026

Example

November 1, 2026 at 12:00 PM in New York (UTC-5) is November 1, 2026 at 5:00 PM in London (UTC+0).

Good to know

  • Daylight saving follows the browser's time zone data.
  • Phoenix is included because it does not use daylight saving.

Common questions

What happens during the fall time change?
The repeated hour happens twice. The result uses the earlier one and says so.
What happens during the spring time change?
The skipped hour does not exist. The calculator says so instead of inventing a time.

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