TimeCubby.

A little clarity, wherever you are.

Time Difference Calculator

Calculate the time difference between two cities on a chosen date. See hours ahead or behind and how daylight saving changes the difference through the year.

Your locations

The first location is your reference. Search a city or enter an IANA zone such as Europe/London.

    Choose your moment

    When clocks repeat an hour

    How many hours ahead or behind?

    Choose exactly two cities to compare their UTC offsets at a specific moment. The yearly table shows when that difference changes, including the weeks when countries change clocks on different dates. Period boundaries are shown in UTC so they are unambiguous.

    A time difference is not travel time. Half-hour and quarter-hour differences are preserved, and converted local dates make yesterday and tomorrow clear.

    Dates supported: 2000–2100. Time-zone rules are checked weekly; future rules can change. All calculations use our server’s time-zone database, not the version installed in your browser.