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Quick Answer

What is GMT time right now?

GMT is Greenwich Mean Time (UTC+00:00). The current GMT time is 10:47.

Greenwich Mean Time (GMT) is UTC+00:00, based on the Royal Observatory at Greenwich, London (51.4769°N, 0°W). The United Kingdom observes GMT in winter and British Summer Time (BST, UTC+01:00) in summer. GMT and UTC share the same UTC+00:00 offset but are technically distinct: UTC is the atomic-clock-based international standard.

Greenwich Mean Time

10:47

Friday, March 6, 2026

UTC+00:00 • Europe/London

Last updated: March 6, 2026

What Is GMT?

GMT stands for Greenwich Mean Time, a timezone at UTC+00:00 (no offset from Coordinated Universal Time) from Coordinated Universal Time. It is used in United Kingdom (winter), Ireland (winter), Portugal (winter), West Africa. The IANA Time Zone Database, the authoritative global reference used by operating systems, programming languages, and web services, records this zone under the identifier Europe/London. IANA identifiers are unambiguous: Europe/London maps to exactly one timezone in the world, unlike the abbreviation GMT, which is specific to this region. During Daylight Saving Time, clocks advance one hour to BST (UTC+01:00).

Greenwich Mean Time is based on the Royal Observatory at Greenwich, London (51.4769°N, 0°W). The Prime Meridian (0° longitude) passes through Greenwich. GMT is a timezone; UTC is the mathematical time standard derived from atomic clocks. They share the UTC+00:00 offset but are technically distinct: GMT can vary by up to 0.9 seconds from UTC due to Earth rotation irregularities.

Current GMT Time and Date

The clock above shows the current GMT time: 10:47 on Friday, March 6, 2026. It is calculated using the browser's Intl.DateTimeFormat API with the IANA identifier Europe/London, the same source your phone and laptop use for timezone conversions. The time updates every second. If you need a static reference, note that GMT is always UTC+00:00 from UTC during standard time (winter). During summer, BST applies at UTC+01:00.

GMT to UTC Conversion

To convert GMT to UTC: GMT and UTC are the same. No conversion needed. In ISO 8601 format, a GMT timestamp is written as 2026-03-06T10:47:00+00:00. This format is unambiguous and machine-readable, always prefer it over abbreviation-only notation for data exchange.

Cities in the GMT Timezone

Major cities that observe GMT (UTC+00:00) include:

These cities all share the IANA zone identifier Europe/London (or a zone with the same current offset). Click any city link to see its live clock, DST status, and time difference from major world cities.

DST Transition Dates for GMT

Greenwich Mean Time observes Daylight Saving Time. During DST, clocks advance by one hour to BST (UTC+01:00).

In Europe, DST begins on the last Sunday of March (clocks spring forward at 01:00 UTC) and ends on the last Sunday of October (clocks fall back at 01:00 UTC). For 2026: DST starts March 29, ends October 25.

During the transition period, when North America and Europe are mid-switch, the offset between GMT cities and other timezones changes temporarily. The live clock on this page always reflects the correct current offset.

DST Variants: GMT vs BST

GMT (UTC+00:00) is the standard time variant, observed during winter months. During Daylight Saving Time, the zone advances to BST (UTC+01:00). In 2026, European DST begins March 29, 2026 at 1:00 AM UTC and ends October 25, 2026 at 1:00 AM UTC. The distinction matters: a meeting scheduled for "14:00 GMT" in January means UTC+00:00; the same description used in July almost certainly means BST (UTC+01:00), which many people informally call "GMT" year-round.

Why Timezone Abbreviations Are Ambiguous

ISO 8601, the international standard for date and time notation, does not define timezone abbreviations. IANA, which maintains the authoritative timezone database, uses geographic identifiers (America/New_York, Asia/Kolkata) rather than abbreviations. Abbreviations emerged from railway timetables and military communications in the 19th and early 20th centuries, before any international standardization effort.

The result is a patchwork. EST is used in North America for UTC-05:00 and in parts of Australia for UTC+10:00 or UTC+11:00. IST covers three different UTC offsets across three continents. CST applies to UTC-06:00 (US Central), UTC+08:00 (China), and UTC-05:00 (Cuba). Even GMT, seemingly the anchor, is used differently than UTC: GMT is a timezone designation specific to the UK and West Africa, while UTC is the mathematical standard maintained by atomic clocks. They share the same offset (UTC+00:00) but are not interchangeable in formal contexts.

Best practice: always write the numeric offset alongside the abbreviation (GMT (UTC+00:00)) or use ISO 8601 format for machine-readable timestamps. For the IANA identifier, use Europe/London.

Converting GMT to Major World Timezones

Current conversions from GMT (10:47) to other major timezones:

  • New York (EST/EDT): 05:47 (UTC-05:00)
  • Dubai (GST): 14:47 (UTC+04:00)
  • India (IST): 16:17 (UTC+05:30)
  • Singapore (SGT): 18:47 (UTC+08:00)
  • Tokyo (JST): 19:47 (UTC+09:00)
  • Sydney (AEST/AEDT): 21:47 (UTC+11:00)

Frequently Asked Questions

What is GMT?

GMT stands for Greenwich Mean Time, a timezone at UTC+00:00 from Coordinated Universal Time. During Daylight Saving Time, it advances to BST (UTC+01:00). The IANA identifier is Europe/London.

What time is it in GMT right now?

The current time in GMT (Greenwich Mean Time, UTC+00:00) is 10:47 on Friday, March 6, 2026. This clock is calculated using the IANA Time Zone Database identifier Europe/London.

Is GMT the same as UTC+00:00?

Yes, GMT (Greenwich Mean Time) is exactly UTC+00:00. It matches UTC exactly.

Does GMT observe Daylight Saving Time?

GMT (Greenwich Mean Time, UTC+00:00) is the standard-time variant and does observe DST. During summer, clocks advance to BST (UTC+01:00). In 2026 for North American zones: DST starts March 8 (clocks spring forward) and ends November 1 (clocks fall back). The switch means meeting times that say "14:00 GMT" in January become "14:00 BST" in summer, at the same UTC time.

What countries or regions use GMT?

Greenwich Mean Time (GMT, UTC+00:00) is used in: United Kingdom (winter), Ireland (winter), Portugal (winter), West Africa. This abbreviation is not shared with other timezones, though always confirm the UTC offset (UTC+00:00) to be certain.

How do I convert GMT time to UTC?

To convert GMT (UTC+00:00) to UTC: GMT and UTC are the same, no conversion needed. 14:00 GMT = 14:00 UTC. In ISO 8601 format, include the offset explicitly: a GMT timestamp looks like 2026-03-05T14:00:00+00:00. This format is unambiguous and safe for international data exchange.