Time ZonesAbout this time zone
Chatham is one of the 2 time zone areas of New Zealand. Computers and phones know it by the zone name Pacific/Chatham. Its time is UTC+13:45 in January and UTC+12:45 in July, because the clocks are changed during the year. Compared with India (IST), it is 8 hours 15 minutes ahead of India in January and 7 hours 15 minutes ahead of India in July.
Clock changes in 2026 and 2027
Chatham 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 5 April 2026: at 3:45 am clocks go back 1 hour to 2:45 am | UTC+12:45 |
| Sunday 27 September 2026: at 2:45 am clocks go forward 1 hour to 3:45 am | UTC+13:45 |
| Sunday 4 April 2027: at 3:45 am clocks go back 1 hour to 2:45 am | UTC+12:45 |
| Sunday 26 September 2027: at 2:45 am clocks go forward 1 hour to 3:45 am | UTC+13:45 |
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 Chatham stay forward for 189 days, from 27 September 2026 to 4 April 2027. That is about 27 weeks, or 52% of a year, on UTC+13:45 and the rest on UTC+12:45. The forward period runs across the new year, because summer in the southern half of the world falls in December and January.
Time difference with major cities
| When it is 12:00 noon in Chatham, it is | In January 2026 | In July 2026 |
|---|---|---|
| India | 3:45 am8 hours 15 minutes behind | 4:45 am7 hours 15 minutes behind |
| United Kingdom | 10:15 pm previous day13 hours 45 minutes behind | 12:15 am11 hours 45 minutes behind |
| France | 11:15 pm previous day12 hours 45 minutes behind | 1:15 am10 hours 45 minutes behind |
| New York, United States | 5:15 pm previous day18 hours 45 minutes behind | 7:15 pm previous day16 hours 45 minutes behind |
| Chicago, United States | 4:15 pm previous day19 hours 45 minutes behind | 6:15 pm previous day17 hours 45 minutes behind |
| Los Angeles, United States | 2:15 pm previous day21 hours 45 minutes behind | 4:15 pm previous day19 hours 45 minutes behind |
| United Arab Emirates | 2:15 am9 hours 45 minutes behind | 3:15 am8 hours 45 minutes behind |
| Singapore | 6:15 am5 hours 45 minutes behind | 7:15 am4 hours 45 minutes behind |
| Japan | 7:15 am4 hours 45 minutes behind | 8:15 am3 hours 45 minutes behind |
| Sydney, Australia | 9:15 am2 hours 45 minutes behind | 9:15 am2 hours 45 minutes behind |
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 Chatham.
- With India, in January: 5:15 pm to 6:00 pm here, which is 9:00 am to 9:45 am in India (45 minutes shared). In July: 4:15 pm to 6:00 pm here, which is 9:00 am to 10:45 am in India (1 hour 45 minutes shared).
- With London, in January: no shared office hour: 9:00 am here is 7:15 pm in London, and 6:00 pm here is 4:15 am there, so one side has to start early or stay late. In July: no shared office hour: 9:00 am here is 9:15 pm in London, and 6:00 pm here is 6:15 am there, so one side has to start early or stay late.
- With New York, in January: 9:00 am to 12:45 pm here, which is 2:15 pm to 6:00 pm in New York (3 hours 45 minutes shared). In July: 9:00 am to 10:45 am here, which is 4:15 pm to 6:00 pm in New York (1 hour 45 minutes 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.