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Convert GMT Timezone

Convert Greenwich Mean Time (GMT) to and from any other time zone.

Convert GMT to any other time zone and back. GMT is Greenwich Mean Time, which runs at UTC+00:00.

The clock below starts on GMT using London, United Kingdom, so you can read straight across to the cities you care about. Add or remove rows to build the comparison you need, and set a date and time to check a moment in the past or future.

    Selected Date: 00:00
    00:00
    23:59

    For more converters, browse our full list of time zone converters.

    GMT covers 35 IANA time zones, including Africa/Abidjan, Africa/Accra, Africa/Bamako, Africa/Banjul, Africa/Bissau, Africa/Conakry and 29 more. Daylight saving is applied automatically for whichever zone a city actually uses, so the result stays correct across the changeover.

    A time standard historically based on the mean solar time at the Royal Observatory in Greenwich, London. It is often used interchangeably with Coordinated Universal Time (UTC), especially in the UK during winter. Some African countries use GMT year-round.

    See the GMT time zone overview for the full picture, or the full time zone converter to compare any cities you like.

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    Browse all time zone converters · GMT time zone overview