Current Time in IANA America/St_Johns Timezone
IANA Name: America/St_Johns
Standard Offset: UTC −03:30
Daylight Saving: Yes
DST Offset: UTC −02:30
DST Abbreviation: NDT
Currently Observing DST: Yes ✅
America/St_Johns: The Half-Hour Zone of Newfoundland
America/St_Johns is the IANA time zone identifier for the island of Newfoundland and parts of Labrador in Canada. It is unique in North America for its unusual offset of UTC-03:30 during standard time (NST) and UTC-02:30 during daylight saving time (NDT). This half-hour offset reflects the region's historical and geographical distinctiveness.
Where America/St_Johns Applies
This zone covers the entire province of Newfoundland and Labrador, including the island of Newfoundland and the southeastern portion of Labrador (south of the Strait of Belle Isle). The major city is St. John's, the provincial capital, located on the eastern tip of the Avalon Peninsula. Other significant communities include Corner Brook, Gander, and Happy Valley-Goose Bay. The zone is shared only with the IANA zone Canada/Newfoundland, which is an alias for America/St_Johns.
Offset and Abbreviation
Standard time is Newfoundland Standard Time (NST), which is UTC-03:30. This means when it is noon UTC, it is 8:30 AM in St. John's. During daylight saving time, clocks advance one hour to Newfoundland Daylight Time (NDT), UTC-02:30. The half-hour offset is a remnant of Newfoundland's pre-Confederation independence; when Canada standardized time zones in the 20th century, Newfoundland retained its unique offset.
Daylight Saving Behavior
America/St_Johns observes daylight saving time (DST) following the same schedule as most of Canada and the United States. Clocks spring forward on the second Sunday in March and fall back on the first Sunday in November. For example, in 2025, DST begins on March 9 (clocks move from 02:00 AM NST to 03:00 AM NDT) and ends on November 2 (clocks move from 02:00 AM NDT to 01:00 AM NST). This pattern repeats annually, with the 2026 changes on March 8 and November 1. The switch times are local, so the entire zone shifts simultaneously.
Countries and Cities
The only country using America/St_Johns is Canada. The primary city is St. John's, with a population of about 110,000. Other notable cities include Mount Pearl and Conception Bay South. The zone does not apply to any other country or territory.
Practical Guidance for Scheduling
Because of its half-hour offset, scheduling with America/St_Johns requires careful calculation. For example, when it is 12:00 PM in New York (Eastern Time, UTC-05:00 standard), it is 1:30 PM in St. John's (NST) during standard time, a 1.5-hour difference. During DST, New York is at UTC-04:00 and St. John's at UTC-02:30, making the difference 1.5 hours as well (since both shift). For London (UTC+00:00 standard), the difference is 3.5 hours during NST and 2.5 hours during NDT. To avoid confusion, always convert using a reliable time zone converter and specify whether DST is in effect. The best overlap for business calls between St. John's and North American cities is typically mid-morning to early afternoon Eastern Time, which corresponds to late morning to early afternoon in St. John's.
Frequently Asked Questions
Why does Newfoundland have a half-hour time zone?
Newfoundland's half-hour offset (UTC-03:30) is a historical legacy. Before joining Canada in 1949, Newfoundland was an independent dominion and chose a time zone that aligned with its geographic position and solar time. When Canada standardized time zones, Newfoundland retained its unique offset.
Does America/St_Johns observe daylight saving time?
Yes, it observes DST from the second Sunday in March to the first Sunday in November, shifting to UTC-02:30 (NDT).
What is the difference between America/St_Johns and Canada/Newfoundland?
Canada/Newfoundland is a canonical alias for America/St_Johns. Both refer to the same time zone and are interchangeable.
What cities use America/St_Johns?
The main city is St. John's, the capital of Newfoundland and Labrador. Other cities include Corner Brook, Gander, and Mount Pearl.
How do I convert St. John's time to New York time?
During standard time, St. John's (NST, UTC-03:30) is 1.5 hours ahead of New York (EST, UTC-05:00). During DST, St. John's (NDT, UTC-02:30) is also 1.5 hours ahead of New York (EDT, UTC-04:00). So the difference is always 1.5 hours.
Is America/St_Johns used anywhere else besides Canada?
No, it is only used in the Canadian province of Newfoundland and Labrador.