Current Time in UTC+4 Zone
About UTC+4
Discover all countries and IANA time zones in the UTC+4 offset. View the current local time for all locations with this UTC offset.
UTC Offset: UTC+4
What is UTC+4?
UTC+4 is a fixed offset from Coordinated Universal Time: clocks on this offset are always 4 hours ahead of UTC. Unlike a named time zone, a UTC offset never shifts for daylight saving time. Regions that observe DST alternate between two different UTC offsets across the year, which is why the countries listed below can change with the seasons.
In aviation, shipping, and military usage, UTC+4 corresponds to the Delta time zone (D), written with the letter suffix D in Zulu notation. Pilots and NATO forces use these letter zones so an order like "0800D" is unambiguous worldwide.
UTC+4 vs GMT+4
On a wall clock, UTC+4 and GMT+4 show the same time. The difference is in what they refer to: UTC is the modern standard kept by atomic clocks and used in computing, aviation, and science, while GMT is the older convention based on mean solar time at Greenwich. Technical systems, logs, and APIs should reference UTC+4.
Time & Daylight in UTC+4
Time Difference Between UTC+4 and Major Cities
Live local time and the difference from UTC+4 right now.
Current time shown is based on the representative IANA zone: Asia/Baku
UTC+4: The Gulf and Caucasus Time Zone
UTC+4 is a fixed offset from Coordinated Universal Time, meaning clocks in this zone are always four hours ahead of UTC. Unlike named time zones, UTC+4 does not observe daylight saving time (DST) in most of its territory, though some regions shift to UTC+5 during summer. This offset covers a diverse swath of the globe, from the oil-rich Gulf states to the Caucasus mountains and islands in the Indian Ocean.
What Is a Fixed UTC Offset?
A fixed UTC offset, such as UTC+4, means the local time is always exactly four hours ahead of UTC. It does not change with seasons. This contrasts with named time zones like Gulf Standard Time (GST) or Samara Time (SAMT), which may include DST rules. In practice, UTC+4 is the standard time for many countries year-round, but some regions (e.g., parts of Russia) use it only during winter and switch to UTC+5 in summer.
Countries and Regions on UTC+4
The following countries and territories use UTC+4 as their standard time (all year, unless noted):
- Armenia (AMT – Armenia Time)
- Azerbaijan (AZT – Azerbaijan Time)
- Georgia (GET – Georgia Standard Time)
- Mauritius (MUT – Mauritius Time)
- Oman (GST – Gulf Standard Time)
- Russia (Samara Time – SAMT, used in Astrakhan, Samara, Saratov, Ulyanovsk, and parts of the Volga region; note that some Russian zones observe DST and shift to UTC+5 in summer)
- Réunion (French overseas department, RET – Réunion Time)
- Seychelles (SCT – Seychelles Time)
- United Arab Emirates (GST – Gulf Standard Time)
Note: The list of countries on UTC+4 is not static. Regions that observe DST move on and off this offset seasonally. For example, most of Russia's UTC+4 zones switch to UTC+5 during summer (from March to October).
IANA Time Zones at UTC+4
The IANA time zone database includes the following zones that use UTC+4 as their standard offset (some may have DST):
- Asia/Baku (Azerbaijan)
- Asia/Dubai (UAE)
- Asia/Muscat (Oman)
- Asia/Tbilisi (Georgia)
- Asia/Yerevan (Armenia)
- Europe/Astrakhan (Russia)
- Europe/Samara (Russia)
- Europe/Saratov (Russia)
- Europe/Ulyanovsk (Russia)
- Indian/Mahe (Seychelles)
- Indian/Mauritius (Mauritius)
- Indian/Reunion (Réunion)
Representative Cities
Major cities that use UTC+4 year-round include: Baku (Azerbaijan), Dubai (UAE), Muscat (Oman), Tbilisi (Georgia), Yerevan (Armenia). In Russia, cities such as Astrakhan, Samara, Saratov, and Ulyanovsk use UTC+4 in winter. Island capitals: Port Louis (Mauritius), Victoria (Seychelles), Saint-Denis (Réunion).
Practical Scheduling Notes
UTC+4 is 1 hour ahead of UTC+3 (e.g., Moscow Time in winter) and 1 hour behind UTC+5 (e.g., Pakistan Standard Time). When scheduling across zones, note that the UAE and Oman share the same offset year-round, while neighboring Iran is UTC+3:30. During northern summer, many European and North American zones shift to DST, reducing the time difference with UTC+4. For example, London (BST, UTC+1) is 3 hours behind UTC+4, while New York (EDT, UTC-4) is 8 hours behind.
Military and Zulu Lettering
In military time zone notation, UTC+4 is designated by the letter 'D' (Delta). Zulu (Z) is the military name for UTC. On a clock, UTC and GMT read the same, so UTC+4 is also GMT+4. For example, 12:00 UTC is 16:00 in Dubai (UTC+4) and also 16:00 GMT+4.
Frequently Asked Questions
What countries are on UTC+4?
Countries that use UTC+4 as standard time include Armenia, Azerbaijan, Georgia, Mauritius, Oman, Russia (parts), Réunion, Seychelles, and the United Arab Emirates. Note that some Russian regions switch to UTC+5 in summer.
Does UTC+4 observe daylight saving time?
What is the time difference between UTC+4 and New York?
New York is on Eastern Time. When New York is on standard time (EST, UTC-5), UTC+4 is 9 hours ahead. When New York is on daylight saving time (EDT, UTC-4), UTC+4 is 8 hours ahead.
What is the military letter for UTC+4?
The military time zone letter for UTC+4 is 'D' (Delta). For example, 14:00 UTC is 14:00 Zulu and 18:00 Delta.
Is UTC+4 the same as GMT+4?
Yes, UTC and GMT are functionally identical for timekeeping purposes. UTC+4 and GMT+4 show the same time on a clock. However, UTC is the modern scientific standard, while GMT is a time zone.
Which major cities use UTC+4?
Major cities on UTC+4 include Dubai (UAE), Abu Dhabi, Muscat (Oman), Baku (Azerbaijan), Tbilisi (Georgia), Yerevan (Armenia), and Port Louis (Mauritius). In Russia: Samara, Astrakhan, Saratov, and Ulyanovsk use it in winter.