Where the America/Thule time zone is used
Countries: 🇬🇱 Greenland.
Area covered: Thule/Pituffik.
America/Thule time zone
Atlantic Time
Atlantic Daylight Time (ADT)
IANA: America/Thule · UTC−3
Daylight saving time in America/Thule
In effect now
Next change: Sun 1 Nov, clocks go back 1 hour (02:00 → 01:00)
Sunrise and sunset in America/Thule today
Sunrise 07:58 · Sunset 18:50
Daylight 10h 52m · Solar noon 13:24
Time in America/Thule vs major world cities
| City | Local time | Difference from America/Thule |
|---|
| New York | Thu | 1 hour behind |
| Los Angeles | Thu | 4 hours behind |
| London | Thu | 4 hours ahead |
| Paris | Thu | 5 hours ahead |
| Dubai | Thu | 7 hours ahead |
| Mumbai | Thu | 8.5 hours ahead |
| Singapore | Fri | 11 hours ahead |
| Tokyo | Fri | 12 hours ahead |
| Sydney | Fri | 13 hours ahead |
| Johannesburg | Thu | 5 hours ahead |
| São Paulo | Thu | same time |
| Chicago | Thu | 2 hours behind |
What time zone is America/Thule in?
Clocks in America/Thule run on Atlantic Time (ADT, UTC−3); software knows the zone as America/Thule.
Does America/Thule observe daylight saving time?
Yes. America/Thule is on daylight saving time now. The next changes:
- Sunday 1 November 2026: clocks go back at 02:00 to 01:00 (ADT → AST)
- Sunday 14 March 2027: clocks go forward at 02:00 to 03:00 (AST → ADT)
- Sunday 7 November 2027: clocks go back at 02:00 to 01:00 (ADT → AST)
America/Thule in software and databases
Standard offset UTC−4, daylight saving offset UTC−3 (as of 2026).
October 2026 calendar for America/Thule
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|
| | | 1 | 2 | 3 | 4 |
| 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| 19 | 20 | 21 | 22 | 23 | 24 | 25 |
| 26 | 27 | 28 | 29 | 30 | 31 | |
Frequently asked questions about America/Thule
What time zone is America/Thule in?
Atlantic Time (ADT), UTC−3; IANA zone America/Thule.
When do the clocks change in America/Thule?
Next on Sunday 1 November 2026, when clocks go back from 02:00 to 01:00.