What is the IANA time zone identifier for Newfoundland?

The IANA time zone identifier for Newfoundland is America/St_Johns. It represents Newfoundland Time, the distinctive Canadian time zone centered on St. John’s and used across the island of Newfoundland, with some use in southeastern Labrador.

The zone is unusual because its standard offset is UTC−3:30 rather than a whole number of hours. During daylight saving time, clocks move to UTC−2:30. Newfoundland’s location and its historical status as a separate dominion helped preserve this half-hour time system when North American time zones were being organized.

In the IANA Time Zone Database, names normally use a continent or region followed by a representative city, so St. John’s supplies the identifier rather than “Newfoundland.” The older name Canada/Newfoundland is retained as a backward-compatible link, but America/St_Johns is the canonical identifier. America/Halifax is a common mistake because most of Atlantic Canada uses Atlantic Time, while America/Toronto and America/New_York refer to Eastern Time and have different offsets and daylight-saving rules.