What does GMT stand for?

GMT stands for Greenwich Mean Time. It is UTC, used in UK (winter), West Africa. The historic reference on the Greenwich meridian. The UK uses GMT in winter and BST in summer.

What is the UTC offset of GMT?

GMT (Greenwich Mean Time) is UTC.

What is the daylight-saving version of GMT?

GMT is the winter (standard) abbreviation. Its counterpart is BST (British Summer Time, UTC+1), used in the other half of the year.

GMT — Greenwich Mean Time

GMT

Greenwich Mean Time

UTC Standard time ↔ BST

UK (winter), West Africa

Now in London: 8:59 AM

Quick facts

Abbreviation: GMT
Full name: Greenwich Mean Time
UTC offset: UTC
Type: Standard time
Seasonal pair: BST (UTC+1)
Used in: UK (winter), West Africa
Example zone: Europe/London

Cities that use GMT

About GMT

GMT is the abbreviation for Greenwich Mean Time, a time zone offset of UTC. It applies in UK (winter), West Africa. It is the standard, winter offset; in summer the same region switches to BST (UTC+1).

The historic reference on the Greenwich meridian. The UK uses GMT in winter and BST in summer.

Time-zone abbreviations are convenient but not unique or official — several codes are shared by more than one zone. When precision matters, use the underlying IANA zone name (for example Europe/London) or the UTC offset UTC instead.

Frequently asked questions

What does GMT stand for?: GMT stands for Greenwich Mean Time. It is UTC, used in UK (winter), West Africa. The historic reference on the Greenwich meridian. The UK uses GMT in winter and BST in summer.
What is the UTC offset of GMT?: GMT (Greenwich Mean Time) is UTC.
What is the daylight-saving version of GMT?: GMT is the winter (standard) abbreviation. Its counterpart is BST (British Summer Time, UTC+1), used in the other half of the year.