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America/Glace_Bay

America/Glace_Bay is the IANA time zone for Atlantic – NS (Cape Breton) in Canada.

UTC−03:00

Tue, Sep 29 UTC−3 ADT

Offsets and daylight saving time

Standard offset
UTC−04:00
Daylight offset
UTC−03:00
Rule
Daylight saving time from the second Sunday in March at 02:00 to the first Sunday in November at 02:00 (local time).

Next clock changes

  • Sunday, November 1, 2026 at 02:00: back to UTC−4 (ADT → AST)
  • Sunday, March 14, 2027 at 02:00: forward to UTC−3 (AST → ADT)

Names

Generic name
Atlantic Time
Abbreviation
AST / ADT
Standard / daylight
Atlantic Standard Time / Atlantic Daylight Time

Use it in code

// JavaScript
new Intl.DateTimeFormat('en-US', { timeZone: 'America/Glace_Bay' })

# Python
from zoneinfo import ZoneInfo
ZoneInfo('America/Glace_Bay')

-- PostgreSQL
SELECT now() AT TIME ZONE 'America/Glace_Bay';

Cities in America/Glace_Bay

Offset history since 1970

  • 1970–1971: UTC−4
  • 1972–2026: UTC−4 and UTC−3 each year

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