GST time now (Gulf Standard Time)

What GST means

GST stands for Gulf Standard Time, UTC+4. It is used in the United Arab Emirates and Oman.

tzdata, the database behind phones and computers, does not use the letters GST: it writes UTC+4 for this time. GST is the customary or CLDR name, so software may show “UTC+4” or “GMT+4” instead.

GST is ambiguous. It also means South Georgia Time (UTC−2, South Georgia and the South Sandwich Islands). This page shows UTC+4, the meaning English searchers usually want.

Where and when GST is used

1 zone uses GST all year. Computed from tzdata under the current rules (tzdata writes UTC+4; the list follows the CLDR name).

Other meanings of GST

When a time arrives with only these letters, look at where the sender is, or ask for the UTC offset. Calendars and programs should never guess a zone from an abbreviation: the IANA database’s own documentation calls abbreviations ambiguous in practice.

GST in the past

Zones whose tzdata history shows GST before 2025 but that no longer use it:

• Pacific/Guam (Saipan): 1900–2000

GST converted to other zones

Every column is a fixed offset, so this table is valid on any date. Remember that the regions behind some columns switch to summer time (EST to EDT, CET to CEST, GMT to BST); the clock in those cities is then an hour later than the column.

Related zones and conversions

• Asia/Dubai time zone
• UTC+4 time
• Time zones of the world
• Daylight saving time
• Time zone converter