How to convert time between time zones
- Choose the date and time, and the time zone it is in. It starts with your local zone.
- The table shows the same moment in every city on your list, with its UTC offset.
- Add cities from the dropdown or remove ones you don’t need. Your list is remembered.
Scheduling across time zones
When planning a call between, say, New York, London and Delhi, there is only a small window where everyone is within working hours. The colored indicators make it easy to spot: 🟢 means 9am–5pm, 🟡 early morning or evening, and 🌙 the middle of the night. Remember that the US and Europe change their clocks on different dates in spring and autumn, so the gap between them changes by an hour for a few weeks each year.
Unusual offsets
Not every zone is a whole number of hours from UTC. India is UTC+05:30, Nepal UTC+05:45, and parts of Australia UTC+09:30. This converter handles all of them.
Related: Unix Timestamp Converter, Date Difference Calculator.
Daylight saving time around the world
Daylight saving time (DST) shifts clocks forward by an hour in spring. The United States and Canada switch on the second Sunday of March and back on the first Sunday of November. Most of Europe switches on the last Sunday of March and the last Sunday of October. Much of the Southern Hemisphere, including parts of Australia and New Zealand, does the opposite. Many countries, including India, China, Japan, Nepal and most of Africa, do not use DST at all. This converter applies all of these rules automatically for the date you pick.
Time zone abbreviations can be ambiguous
Abbreviations like CST can mean Central Standard Time in North America, China Standard Time or Cuba Standard Time. IST can be India, Ireland or Israel. To avoid confusion, choose a city or an IANA zone name such as America/Chicago or Asia/Kolkata rather than an abbreviation, and include the UTC offset in meeting invitations.
Best overlapping hours for common pairs
- New York and London: 9am–12pm in New York is 2pm–5pm in London.
- London and Delhi: 8:30am–12:30pm in London is 2pm–6pm in Delhi (in UK winter time; an hour less apart in UK summer).
- San Francisco and Sydney: late afternoon in San Francisco is early morning the next day in Sydney.
Use the table above to check exact times for your date, since DST changes shift these windows by an hour for part of the year.
Frequently asked questions
Does it handle daylight saving time?
Yes. It uses your browser’s up-to-date IANA time zone database, so daylight saving changes are applied automatically for every date, past or future.
How do I find a good meeting time across time zones?
Add every participant’s city. Green dots show 9am–5pm business hours; adjust the time until everyone shows green or yellow.
Are my cities saved?
Yes. The list of time zones you add is stored in your browser so it is there next time you visit.
What is the difference between GMT and UTC?
For everyday use they are the same time. UTC is the precise atomic-clock standard; GMT is the time zone used in the UK in winter.