Time Zone Converter
Scheduling across time zones is error-prone because clocks do not just differ by a fixed number of hours: daylight saving time starts and ends on different dates in different countries, India has a half-hour offset and some zones skip or repeat an hour. This converter takes a date and time in one zone and shows it in another using the browser’s built-in IANA time-zone database, so the daylight-saving rules for that exact date are applied correctly. It also shows the offsets, the time difference and the same moment in other major cities — handy for planning meetings and calls between India, the US, the UK, Europe and Australia.
How to use the time zone converter
- Choose the date and the time in the first zone.
- Select the zone you are converting from and the zone you want.
- Read the converted time and date, the time difference and the UTC offsets on that date.
- Check the “also in” cities to find a time that works for everyone.
Formula
Converted time = local time in the source zone − its UTC offset on that date + the target zone’s UTC offset on that date. Offsets change with daylight saving: for example New York is UTC−5 in winter and UTC−4 in summer, while India is UTC+5:30 all year. The calculator reads each zone’s offset for the exact date, so conversions near clock changes are correct.
Worked examples
India to New York
9:00 on 5 October 2026 in India is Sunday, October 4, 2026 · 23:30.
A winter versus summer gap
London and New York are usually five hours apart, but for a few weeks each spring and autumn the daylight-saving dates differ. Noon in London on 15 January 2026 is Thursday, January 15, 2026 · 07:00.
A time that does not exist
On 8 March 2026 clocks in New York jump from 2:00 to 3:00, so 2:30 does not exist that day. The calculator says so instead of giving a wrong answer.
Time zone basics
Common offsets (standard time)
| City | Standard offset | Daylight saving? |
|---|---|---|
| India (Mumbai, Delhi) | UTC+5:30 | No |
| New York | UTC−5 | Yes (UTC−4) |
| Los Angeles | UTC−8 | Yes (UTC−7) |
| London | UTC+0 | Yes (UTC+1) |
| Paris / Berlin | UTC+1 | Yes (UTC+2) |
| Dubai | UTC+4 | No |
| Singapore | UTC+8 | No |
| Tokyo | UTC+9 | No |
| Sydney | UTC+10 | Yes (UTC+11) |
Tips for meetings
- Pick a time inside everyone’s 8 am–8 pm window; the “also in” list helps.
- Write the time with the zone and date: “09:00 IST, 5 October”.
- Be careful in March–April and October–November when US and Europe change clocks on different dates.
Practice problems
Try these yourself first, then check your answer. The answers come from the calculator above.
- A call at 21:00 in Mumbai on 12 January 2027. What time is it in London?
Show answer
London time: Tuesday, January 12, 2027 · 15:30
Common mistakes to avoid
- Assuming a fixed hour difference all year. Daylight saving changes it, and not on the same dates everywhere.
- Forgetting the date can change. Converting 9 pm to Asia can land on the next day.
- Using 12-hour times without am/pm. This tool uses 24-hour time to avoid mistakes.
- Assuming every country uses daylight saving. India, China, Japan and many others do not.
- Scheduling across the two weeks when US and Europe change clocks on different dates without checking.
Frequently asked questions
How do I convert time between time zones?
Convert the local time to UTC using the source zone’s offset, then add the target zone’s offset. The converter does it with the correct daylight-saving offset for the date.
What is the time difference between India and the US?
India (UTC+5:30) is 10½ hours ahead of New York in winter (UTC−5) but only 9½ hours ahead while the US is on daylight saving time (UTC−4). Los Angeles is 13½ hours behind India in winter and 12½ in summer. Pick your cities and date above for the exact difference.
Does India use daylight saving time?
No. India Standard Time is UTC+5:30 all year.
When does daylight saving start?
In the US it starts on the second Sunday of March and ends on the first Sunday of November. The EU and UK change on the last Sunday of March and October. Dates vary elsewhere.
What is UTC?
Coordinated Universal Time, the reference time scale from which time zones are offset.
Sources and further reading
Reviewed September 26, 2026 by the SolveCalcPro editorial team. Found a mistake? Tell us; see our editorial policy.