Time ZonesAbout this time zone
Broken Hill is one of the 12 time zone areas of Australia. Computers and phones know it by the zone name Australia/Broken_Hill. Its time is UTC+10:30 in January and UTC+9:30 in July, because the clocks are changed during the year. The short names used for this time are ACDT and ACST. Compared with India (IST), it is 5 hours ahead of India in January and 4 hours ahead of India in July.
Clock changes in 2026 and 2027
Broken Hill 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 3:00 am clocks go back 1 hour to 2:00 am | UTC+9:30 (ACST) |
| Sunday 4 October 2026: at 2:00 am clocks go forward 1 hour to 3:00 am | UTC+10:30 (ACDT) |
| Sunday 4 April 2027: at 3:00 am clocks go back 1 hour to 2:00 am | UTC+9:30 (ACST) |
| Sunday 3 October 2027: at 2:00 am clocks go forward 1 hour to 3:00 am | UTC+10:30 (ACDT) |
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 Broken Hill stay forward for 182 days, from 4 October 2026 to 4 April 2027. That is about 26 weeks, or 50% of a year, on UTC+10:30 and the rest on UTC+9:30. 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 Broken Hill, it is | In January 2026 | In July 2026 |
|---|---|---|
| India | 7:00 am5 hours behind | 8:00 am4 hours behind |
| United Kingdom | 1:30 am10 hours 30 minutes behind | 3:30 am8 hours 30 minutes behind |
| France | 2:30 am9 hours 30 minutes behind | 4:30 am7 hours 30 minutes behind |
| New York, United States | 8:30 pm previous day15 hours 30 minutes behind | 10:30 pm previous day13 hours 30 minutes behind |
| Chicago, United States | 7:30 pm previous day16 hours 30 minutes behind | 9:30 pm previous day14 hours 30 minutes behind |
| Los Angeles, United States | 5:30 pm previous day18 hours 30 minutes behind | 7:30 pm previous day16 hours 30 minutes behind |
| United Arab Emirates | 5:30 am6 hours 30 minutes behind | 6:30 am5 hours 30 minutes behind |
| Singapore | 9:30 am2 hours 30 minutes behind | 10:30 am1 hour 30 minutes behind |
| Japan | 10:30 am1 hour 30 minutes behind | 11:30 am30 minutes behind |
| Sydney, Australia | 12:30 pm30 minutes ahead | 12:30 pm30 minutes ahead |
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 Broken Hill
A time zone is an agreement, and the sun does not follow it exactly. Broken Hill, the largest city in this zone, lies at about 141.4° east. Each degree of longitude is worth four minutes, so by the sun alone its time would be about 9 hours 26 minutes ahead of UTC. The clock is set to UTC+9:30. The sun is therefore highest in the sky at about 12:04 pm by the clock on standard time, and at about 1:04 pm while the clocks are moved (UTC+10:30). That is a close match: clock and sun agree to within a quarter of an hour. Other places in the zone, to the east or west of Broken Hill, 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
Broken Hill is about 32° south of the equator. On the longest day of the year, around 21 December, the sun is up for about 14 hours 15 minutes. On the shortest, around 21 June, for about 10 hours 3 minutes. That swing of about 4 hours 11 minutes between summer and winter is the reason clocks are moved here: the extra summer daylight is shifted from the early morning to the evening.
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 Broken Hill.
- With India, in January: 2:00 pm to 6:00 pm here, which is 9:00 am to 1:00 pm in India (4 hours shared). In July: 1:00 pm to 6:00 pm here, which is 9:00 am to 2:00 pm in India (5 hours shared).
- With London, in January: no shared office hour: 9:00 am here is 10:30 pm in London, and 6:00 pm here is 7:30 am there, so one side has to start early or stay late. In July: 5:30 pm to 6:00 pm here, which is 9:00 am to 9:30 am in London (30 minutes shared).
- With New York, in January: 9:00 am to 9:30 am here, which is 5:30 pm to 6:00 pm in New York (30 minutes shared). In July: no shared office hour: 9:00 am here is 7:30 pm in New York, and 6:00 pm here is 4:30 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, Broken Hill, with about 17,000 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: Broken Hill.
Places with exactly the same time
These zones show the same time as Broken Hill through the whole year: Adelaide, Australia.
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.