Technical Specifications & Standards
Official chronometric properties, ISO standards, and international database registry identifiers for Newfoundland Daylight Time:
Daylight Saving Time (DST) Transitions
⬆️ Spring Forward (Clocks Advance)
Clocks advance 1 hour from NST on the second Sunday in March at 02:00
⬇️ Fall Back (Clocks Return)
Clocks return 1 hour to NST on the first Sunday in November at 02:00
Observing Jurisdictions & Subdivisions
1 Sovereign NationsSovereign nations, administrative subdivisions, and regional territories officially operating under NDT:
Regional Subdivisions & Territory Details
Financial Markets & Trading Hours
Provides summer daylight alignment for North Atlantic maritime operations and offshore energy logistics.
Local Hours: 11:00 - 17:30 NDT
UTC Window: 13:30 - 20:00 UTC
Major Cities in NDT
Primary metropolitan centers and financial hubs observing this time zone:
Adoption History & Astronomical Facts
Year Established: 1988
Newfoundland Daylight Time shifts clocks one hour forward from UTC-3:30 to UTC-2:30, harmonizing transition dates with mainland Canadian provinces and the United States.
In 1988, Newfoundland experimented with 'double daylight saving time' (advancing clocks two hours to UTC-1:30), but returned to the standard one-hour advance after public debate.
Frequently Asked Questions about NDT
What does NDT stand for?
NDT stands for Newfoundland Daylight Time, which is two hours and thirty minutes behind UTC (UTC-2:30).
When is NDT observed?
NDT is observed from the second Sunday in March to the first Sunday in November.
What is the time difference between NDT and New York (EDT)?
Newfoundland (UTC-2:30) is 1 hour and 30 minutes ahead of New York (EDT, UTC-4) during summer.