Time ZonesAbout this time zone
Bougainville is one of the 2 time zone areas of Papua New Guinea. Computers and phones know it by the zone name Pacific/Bougainville. Its time is UTC+11, which means it is 11 hours ahead of Coordinated Universal Time (UTC) all year round. Compared with India (IST), it is 5 hours 30 minutes ahead of India.
Clock changes in 2026 and 2027
Bougainville does not change its clocks in 2026 or 2027. The time stays at UTC+11 all year, so there is no daylight saving time to remember.
Time difference with major cities
| When it is 12:00 noon in Bougainville, it is | In January 2026 | In July 2026 |
|---|---|---|
| India | 6:30 am5 hours 30 minutes behind | 6:30 am5 hours 30 minutes behind |
| United Kingdom | 1:00 am11 hours behind | 2:00 am10 hours behind |
| France | 2:00 am10 hours behind | 3:00 am9 hours behind |
| New York, United States | 8:00 pm previous day16 hours behind | 9:00 pm previous day15 hours behind |
| Chicago, United States | 7:00 pm previous day17 hours behind | 8:00 pm previous day16 hours behind |
| Los Angeles, United States | 5:00 pm previous day19 hours behind | 6:00 pm previous day18 hours behind |
| United Arab Emirates | 5:00 am7 hours behind | 5:00 am7 hours behind |
| Singapore | 9:00 am3 hours behind | 9:00 am3 hours behind |
| Japan | 10:00 am2 hours behind | 10:00 am2 hours behind |
| Sydney, Australia | 12:00 pmsame time | 11:00 am1 hour behind |
The table uses the offsets in force in mid January and mid July 2026. Use the converter for any other date.
Clock time and sun time in Bougainville
A time zone is an agreement, and the sun does not follow it exactly. Arawa, the largest city in this zone, lies at about 155.6° east. Each degree of longitude is worth four minutes, so by the sun alone its time would be about 10 hours 22 minutes ahead of UTC. The clock is set to UTC+11. The sun is therefore highest in the sky at about 12:38 pm by the clock, not at 12:00. The clock runs ahead of the sun here, which means later sunrises and lighter evenings than the map alone would give. Other places in the zone, to the east or west of Arawa, see the sun peak a little earlier or later. Through the year the figure also drifts by up to a quarter of an hour either way.
How long the day is
Arawa is about 6.2° south of the equator. On the longest day of the year, around 21 December, the sun is up for about 12 hours 29 minutes. On the shortest, around 21 June, for about 11 hours 46 minutes. So close to the equator the day is almost the same length all year. Moving the clocks would gain nothing, and Bougainville does not do it.
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 Bougainville.
- With India, all year: 2:30 pm to 6:00 pm here, which is 9:00 am to 12:30 pm in India (3 hours 30 minutes shared).
- With London, in January: no shared office hour: 9:00 am here is 10:00 pm in London, and 6:00 pm here is 7:00 am there, so one side has to start early or stay late. In July: no shared office hour: 9:00 am here is 11:00 pm in London, and 6:00 pm here is 8:00 am there, so one side has to start early or stay late.
- With New York, in January: 9:00 am to 10:00 am here, which is 5:00 pm to 6:00 pm in New York (1 hour shared). In July: no shared office hour: 9:00 am here is 6:00 pm in New York, and 6:00 pm here is 3:00 am there, so one side has to start early or stay late.
How many people keep this time
The GeoNames list has 1 place of 15,000 people or more in this zone area, Arawa, with about 40,000 people. People in villages and smaller towns are not in that count, so the true number on this clock is higher.
Cities that keep this time
The largest cities in this zone: Arawa.
Places with exactly the same time
These zones show the same time as Bougainville through the whole year: Magadan, Russia, Sakhalin, Russia, Efate, Vanuatu, Guadalcanal, Solomon Islands, Noumea, New Caledonia, Pohnpei, Micronesia.
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.