Time zone · Americas
NDT
Newfoundland Daylight Time
Newfoundland Daylight Time (NDT) is a unique timezone in Canada that sits at UTC-03:30 standard and UTC-02:30 during daylight saving—making it one of the world’s few half-hour offset zones, with a rhythm that shapes daily life and cross-border coordination in Newfoundland.
Wednesday, October 14, 2026
Current offset
UTC-02:30
Daylight · NDT
Daylight saving
Active
Reverts 1 Nov 2026
IANA zones
1
1 observe DST, 0 don't
DST offset
—
No summer variant
About NDT
Standard time, with a summer shift.
Newfoundland Daylight Time (NDT) is a unique timezone in Canada that sits at UTC-03:30 standard and UTC-02:30 during daylight saving—making it one of the world’s few half-hour offset zones, with a rhythm that shapes daily life and cross-border coordination in Newfoundland.
IANA zones · the technical identifiers
The zone that resolve to NDT.
For software, always store the IANA identifier — never the abbreviation alone. The database keeps these zones distinct because their rules can, and historically did, diverge.
Where NDT is used
One country.
Convert
NDT to the world's clocks.
Frequently asked questions
Common questions about NDT, daylight saving, and how to handle it in software. Can't find what you need? Email [email protected].
- Why does Newfoundland use a 30-minute offset from UTC?
- Newfoundland's clocks were originally set to St. John's local mean time (UTC-03:30:52). In 1935 this was rounded to UTC-03:30, which Newfoundland kept after joining Canada in 1949.
- How does NDT’s daylight saving shift compare to most other Canadian times?
- While much of Canada shifts by one hour during DST, Newfoundland shifts from UTC-03:30 to UTC-02:30—a full hour ahead, but still maintaining its unique half-hour offset from UTC.
- What’s special about the DST period in Newfoundland?
- Nothing unusual: Newfoundland changes clocks on the same dates as eastern Canada and the US, so during daylight saving it stays 30 minutes ahead of Atlantic Daylight Time and 90 minutes ahead of Eastern Daylight Time.
- How does NDT affect flight and business scheduling with the rest of Canada?
- Every time difference between Newfoundland and the rest of Canada includes an extra half hour. During NDT, St. John's is 30 minutes ahead of Halifax, 1 hour 30 minutes ahead of Toronto, and 2 hours 30 minutes ahead of Winnipeg.
- When does NDT end each year?
- Daylight saving in Newfoundland ends on the first Sunday in November, when clocks fall back from NDT to NST (UTC-03:30).
- Why is St. John’s the main representative zone for NDT?
- St. John’s is the capital and largest city of Newfoundland and Labrador, and it is the reference city for Newfoundland Time.
- Are there other places using a 30-minute offset like NDT?
- Very few. Newfoundland’s NDT is one of a handful of global zones—alongside places like Iran, India, Afghanistan, Myanmar, and parts of Australia—that use a 30-minute offset from UTC.
- How does NDT impact media, TV, and streaming schedules?
- A show that airs live at 8 p.m. Atlantic Time airs at 8:30 p.m. in Newfoundland, and one at 8 p.m. Eastern Time airs at 9:30 p.m. That is why Canadian announcements often add “half an hour later in Newfoundland.”
- What’s a quirky fact about NDT’s timekeeping history?
- Newfoundland set its own time as a separate dominion until it joined Canada in 1949. It used St. John's local mean time (UTC-03:30:52) until 1935, and in 1988 it briefly tried “double daylight time” at UTC-01:30.
Source: IANA tzdb2026d · Reviewed
Free · Developer API
This time zone, as JSON.
Its defining offset, DST status and member counts, from one endpoint.
Also in the API: time zones by coordinates, conversions that flag daylight saving gaps, and abbreviations decoded.
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