Time Zone Converter — Compare Times Worldwide
Pick a date and time in one time zone and instantly see the equivalent local time in up to several destination zones at once — each showing the converted time, date (day before, same day, or next day), current UTC offset, and hour difference from the source. Every conversion uses real IANA time zone identifiers through the browser's Intl API, so daylight saving is handled correctly and automatically, never a manual fixed-offset guess.
About the time zone converter
Pick a date, time and source zone, then convert to one or more destinations at once — each with local time, date shift, UTC offset and hour difference. IANA zones keep DST correct.
Converting by hand means remembering each offset and whether daylight saving is on — the usual cause of scheduling mistakes. Here every result comes from the browser's IANA time zone database, so the difference is correct for the date you pick. It covers EST/EDT, CST/CDT, MST, PST/PDT, GMT/BST, CET, IST, JST and every other IANA zone.
Common time zone offsets
| Abbreviation | Zone | UTC offset |
|---|---|---|
| GMT / UTC | London (winter) | UTC+0 |
| EST / EDT | New York | UTC-5 / UTC-4 |
| CST / CDT | Chicago | UTC-6 / UTC-5 |
| PST / PDT | Los Angeles | UTC-8 / UTC-7 |
| IST | India (no DST) | UTC+5:30 |
| JST | Japan (no DST) | UTC+9 |
When to use it
- Scheduling a meeting or call across multiple time zones.
- Checking what time it is right now for a colleague, client or family member abroad.
- Working out what time a flight actually lands in local time.
- Checking whether a deadline in another time zone falls on the same day or the next.
How to use it
- Enter the source date, time and time zone.
- Add one or more destination time zones — search by city or country.
- Read each destination's converted time, date shift, UTC offset and hour difference.
Tips
- Use the quick-select shortcuts for common conversions like EST to IST.
- Search zones by city name if you don't know the exact IANA identifier.
FAQ
Does this handle daylight saving time correctly?
Yes — conversions use IANA zones via the browser's Intl API, so DST is applied for the date you enter.
Can I convert to more than one destination at once?
Yes — add several destination time zones and see all of them converted from the same source time simultaneously.
Why use IANA zones instead of abbreviations like EST or IST?
Abbreviations like EST are ambiguous (several zones share similar names) and don't carry daylight-saving rules. IANA identifiers like America/New_York are unambiguous and always resolve to the correct current offset.
What is the time difference between EST and IST?
India (UTC+5:30) is 10 hours 30 minutes ahead of US Eastern in winter (EST) and 9 hours 30 minutes ahead in summer (EDT), because India has no daylight saving. Enter a date to see the exact gap.
How do I convert PST to GMT?
Set the source to America/Los_Angeles and add Europe/London. PST is UTC-8 and GMT is UTC+0, an 8-hour gap, but the two switch daylight saving on different dates, so it is briefly 7 hours in spring and autumn. The converter handles those weeks.
Why does the time difference between two cities change during the year?
Because daylight saving starts and ends on different dates in different countries, and some places do not observe it at all. India and Japan never change, while the US and UK do, on different weekends.
Can I convert to several time zones at once?
Yes — add as many destination zones as you need and they are all converted from the same source time together, which is the usual way to find a meeting slot across a distributed team.
How do I convert IST to EST?
India Standard Time (IST, UTC+5:30) is 10 hours 30 minutes ahead of US Eastern Standard Time (EST, UTC-5), and 9 hours 30 minutes ahead when the US is on daylight time (EDT, UTC-4) — so 9:00 PM IST is 10:30 AM EST. Pick both zones above and the converter does the daylight-saving maths for you.