IANA time zone · Atlantic Standard Time
America/St_Thomas
- UTC offset
- UTC-4
- Now
- Atlantic Standard Time (AST)
- Country
- U.S. Virgin Islands
Clock changes in 2026 and 2027
Clocks in this zone don’t change – it stays on UTC-4 all year.
Cities in the America/St_Thomas zone
- St Croix U.S. Virgin Islands
- Charlotte Amalie U.S. Virgin Islands
The identifier America/St_Thomas comes from the IANA time zone database (tz database) used by operating systems, browsers and programming languages. A zone in this database is an area where clocks have agreed since 1970 – which is why one country can have several zones with the same offset.