Time zone

Atlantic Time

Current time
18:4531
Sunday, May 31, 2026
ADT UTC-3 Daylight saving
Abbreviation
AT
Standard zone
Atlantic Standard Time (AST) UTC-4
DST zone
Atlantic Daylight Time (ADT) UTC-3
Currently active
ADT (UTC-3)
Next change
1 Nov 2026, 01:00 → AST (UTC-4)
IANA
Atlantic/Bermuda and 5 others
Show all ▾
  • Atlantic/Bermuda
  • America/Halifax
  • America/Glace_Bay
  • America/Moncton
  • America/Goose_Bay
  • America/Thule

Regions and cities observing Atlantic Time

Atlantic Time — zone map
Time-zone boundaries © OpenStreetMap contributors, via timezone-boundary-builder (ODbL).