Time ZonesAbout this time zone
Adak is one of the 29 time zone areas of the United States. Computers and phones know it by the zone name America/Adak. Its time is UTC−10 in January and UTC−9 in July, because the clocks are changed during the year. The short names used for this time are HST and HDT. Compared with India (IST), it is 15 hours 30 minutes behind India in January and 14 hours 30 minutes behind India in July.
Clock changes in 2026 and 2027
Adak changes its clocks during the year. These are the changes for 2026 and 2027, worked out from the rules in the IANA time zone database.
| Clock change (local time) | New offset |
|---|---|
| Sunday 8 March 2026: at 2:00 am clocks go forward 1 hour to 3:00 am | UTC−9 (HDT) |
| Sunday 1 November 2026: at 2:00 am clocks go back 1 hour to 1:00 am | UTC−10 (HST) |
| Sunday 14 March 2027: at 2:00 am clocks go forward 1 hour to 3:00 am | UTC−9 (HDT) |
| Sunday 7 November 2027: at 2:00 am clocks go back 1 hour to 1:00 am | UTC−10 (HST) |
Governments sometimes change these rules at short notice. Check an official source before fixing travel or meetings far ahead.
Counting from those dates, the clocks in Adak stay forward for 237 days, from 8 March 2026 to 1 November 2026. That is about 34 weeks, or 65% of a year, on UTC−9 and the rest on UTC−10.
Time difference with major cities
| When it is 12:00 noon in Adak, it is | In January 2026 | In July 2026 |
|---|---|---|
| India | 3:30 am next day15 hours 30 minutes ahead | 2:30 am next day14 hours 30 minutes ahead |
| United Kingdom | 10:00 pm10 hours ahead | 10:00 pm10 hours ahead |
| France | 11:00 pm11 hours ahead | 11:00 pm11 hours ahead |
| New York, United States | 5:00 pm5 hours ahead | 5:00 pm5 hours ahead |
| Chicago, United States | 4:00 pm4 hours ahead | 4:00 pm4 hours ahead |
| Los Angeles, United States | 2:00 pm2 hours ahead | 2:00 pm2 hours ahead |
| United Arab Emirates | 2:00 am next day14 hours ahead | 1:00 am next day13 hours ahead |
| Singapore | 6:00 am next day18 hours ahead | 5:00 am next day17 hours ahead |
| Japan | 7:00 am next day19 hours ahead | 6:00 am next day18 hours ahead |
| Sydney, Australia | 9:00 am next day21 hours ahead | 7:00 am next day19 hours ahead |
The table uses the offsets in force in mid January and mid July 2026. Use the converter for any other date.
Office hours shared with other places
If both sides work from 9 am to 6 pm, these are the hours when a call falls inside the working day at both ends. Times are for Adak.
- With India, in January: 5:30 pm to 6:00 pm here, which is 9:00 am to 9:30 am in India (30 minutes shared). In July: no shared office hour: 9:00 am here is 11:30 pm in India, and 6:00 pm here is 8:30 am there, so one side has to start early or stay late.
- With London, all year: no shared office hour: 9:00 am here is 7:00 pm in London, and 6:00 pm here is 4:00 am there, so one side has to start early or stay late.
- With New York, all year: 9:00 am to 1:00 pm here, which is 2:00 pm to 6:00 pm in New York (4 hours shared).
The clock above uses your device's clock and the time zone rules built into your browser. Rules on this page: IANA time zone database 2026f. See About and data sources.