datetimeuk

Time zone converter

Link to this conversion

09:00 in London, UK, Thursday 1 October 2026

PlaceTimeDateZoneDifferenceRemove
London, UK09:00Thursday 1 October 2026BST—
New York04:00Thursday 1 October 2026GMT-4−5 h
India13:30Thursday 1 October 2026GMT+5:30+4:30 h
Sydney18:00Thursday 1 October 2026GMT+10+9 h

How to use it

  1. Pick a date and a time. It starts on the current UK time; Now resets it.
  2. Leave From on London to convert UK time, or choose the place where the time applies.
  3. Add up to five places. Places with their own pages on this site come first, then every zone your browser knows.
  4. Read the time, date and difference for each place, and use Link to this conversion to share it.

How clock changes are handled

A converter that adds a fixed number of hours goes wrong for several weeks a year, because countries change their clocks on different dates. This one works out each place's offset from UTC at the exact moment you entered, so the answer is right for that date, not for today.

Take 9am UK time and New York. On Saturday 24 October 2026 New York is 5 hours behind, so it is 4am there. On Monday 26 October the UK has gone back to GMT but New York is still on daylight time until 1 November, so 9am in London is 5am in New York, 4 hours behind. From Monday 2 November it is 4am again. Sydney moves the other way: its clocks went forward on 4 October 2026, so the gap with London grows from 9 hours to 10, then 11 after 25 October.

Times that do not exist or happen twice

When the UK clocks go forward at 1am on Sunday 28 March 2027, the time jumps to 2am, so 1:30am never happens. If you enter it, the converter tells you and shows 2:30am BST, the moment it would have been. When the clocks go back at 2am on Sunday 25 October 2026, 1am to 2am happens twice; the converter uses the first one, in BST, and says so. Other countries' changes are handled the same way.

Sharing a conversion

The page address updates as you work, for example ?t=2026-12-01T09:00&z=Asia/Kolkata,America/New_York. t is the date and time, z lists the places by their IANA names, and from is added when you start somewhere other than the UK. Anyone who opens the link sees the same conversion in their own browser.

To find an hour that suits everyone, use the meeting planner. For live clocks, see the world clock, and for the UK's own rules, British Summer Time and when the clocks change. Abbreviations such as EST and IST are decoded on time zones explained.

Frequently asked questions

Does the converter handle daylight saving time?

Yes. It works out each place's offset for the exact date and time you enter, using your browser's copy of the IANA time zone database, so clock changes in the UK and elsewhere are included.

Why is New York only 4 hours behind the UK some weeks?

The US changes its clocks on the second Sunday in March and the first Sunday in November, while the UK changes on the last Sundays of March and October. In the weeks between, the gap is 4 hours instead of 5. In 2026 that is from 25 October to 1 November.

Can I convert from somewhere other than the UK?

Yes. Change the From place to any time zone and enter the time there. The results show every other place's time and its difference from your starting point.

How do I send a conversion to someone?

Use the Link to this conversion button, or copy the page address. It contains the date, time and places, so the other person sees the same result.

Is anything I enter stored?

No. The conversion runs in your browser and nothing is sent to a server. The only record is the link in your address bar.