NST — Newfoundland Standard Time
Newfoundland, Canada (UTC-3:30).
NST stands for Newfoundland Standard Time. Newfoundland, Canada (UTC-3:30).
NST is UTC-03:30 from Coordinated Universal Time (UTC). The primary IANA zone is America/St_Johns.
NST is the standard-time abbreviation; it shifts to NDT (UTC-02:30) during daylight saving time.
Standard / daylight pair
NDT · UTC−2:30 — March–November in Canada
Countries using this zone
- Canada
Principal cities
- St. John's
- Corner Brook
- Mount Pearl
- Gander
- Paradise
- Grand Falls-Windsor
- Torbay
History
Newfoundland adopted its unique 30-minute offset in the early 20th century to align clocks more closely with the solar position in the capital, St. John's. Although Newfoundland joined the Canadian Confederation in 1949, it chose to retain its independent time zone rather than merging with the Atlantic Time Zone. In 2011, the province updated its daylight saving rules to synchronize transition dates with the rest of North America.
Frequently Asked Questions
NST — Newfoundland Standard Time. Newfoundland, Canada (UTC-3:30).
NST is UTC-03:30. It is paired with NDT (UTC-02:30).
Countries and territories primarily using NST include: CA.
Yes. Zones using NST shift to NDT (UTC-02:30) during daylight saving time and return to NST when DST ends.
NST is the winter (standard) abbreviation and NDT is the summer (daylight-saving) abbreviation. NDT is one hour ahead of NST.
The primary IANA time zone representing NST is America/St_Johns. Operating systems and programming libraries use this identifier to resolve local time.
Newfoundland Standard Time (NST) and Newfoundland Daylight Time (NDT) are the seasonal phases of the same time zone. NST is the standard winter offset of UTC−3:30, while NDT is the summer daylight saving offset of UTC−2:30. Residents move their clocks forward 1 hour each spring to enter the daylight saving phase.
The 30-minute offset was chosen because the island of Newfoundland is situated approximately halfway between the standard meridians for the Atlantic and Greenland time zones. By using a half-hour increment, the province ensures that local noon aligns more accurately with the sun's highest point in the sky over St. John's.
Clocks in the Newfoundland time zone shift forward by 1 hour on the second Sunday of March at 02:00 local time. They return to standard time by shifting back 1 hour on the first Sunday of November at 02:00. This schedule matches the standard daylight saving transition used throughout most of North America.
While most of Labrador follows Atlantic Time, the southeastern region from L'Anse-au-Clair to Norman Bay uses Newfoundland Standard Time. These communities maintain the same schedule as the island of Newfoundland for cultural, economic, and administrative reasons, ensuring consistency for local government services and regional transportation schedules.
Newfoundland is not unique globally, but it is the only 30-minute offset in North America. Other regions such as India, parts of Australia (including the Northern Territory and South Australia), and Iran also utilize fractional offsets to better synchronize their local time with the physical position of the sun.