GST — Gulf Standard or South Georgia Time
GST is ambiguous: it stands for 2 different times, both in use today. When a message says “GST”, the sender’s country usually tells you which one is meant; to be safe, write the UTC offset (for example GST = UTC+4 or GST = UTC−2).
- Gulf Standard Time · UTC+4 · UAE and Oman
- South Georgia Time · UTC−2 · South Georgia and the South Sandwich Islands
Gulf Standard Time
UTC+04:00
GST stands for Gulf Standard Time, UTC+4, 4 hours ahead of UTC. It is used all year in UAE and Oman.
Countries and territories: United Arab Emirates and Oman.
Zones: Asia/Dubai, Asia/Muscat.
South Georgia Time
UTC−02:00
GST stands for South Georgia Time, UTC−2, 2 hours behind UTC. It is used all year in the South Georgia and the South Sandwich Islands.
Countries and territories: South Georgia and the South Sandwich Islands.
Zones: Atlantic/South_Georgia.