ClockAura

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 time zone, then convert it to one or more destination time zones at once — each shown with its local time, date shift (day before/same/next day), UTC offset, and hour difference from the source, using real IANA time zones so DST is always handled correctly.

To convert time between zones by hand you have to remember each region's current offset and whether daylight saving is active — which is exactly why scheduling mistakes are so common. This converter avoids manual offset math entirely: pick a source date/time and zone, add one or more destination zones, and every result is computed through the browser's real IANA time zone database, so the time difference it shows is always correct for today's date. It covers the common US and international zones people search for — EST and EDT (Eastern), CST and CDT (Central), MST (Mountain), PST and PDT (Pacific), GMT and BST in the UK, CET in Europe, IST in India, and JST in Japan — plus every other IANA zone worldwide.

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.
Working out the time difference between two cities before booking a call.
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 — every conversion uses the real IANA time zone identifier through the browser's Intl API, so daylight saving transitions are applied automatically and correctly 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 (IST, UTC+5:30) is 10 hours 30 minutes ahead of US Eastern during EST in winter, and 9 hours 30 minutes ahead during EDT in summer — because India does not observe daylight saving but the US does. Enter any date above and the converter shows the exact difference for that specific day, DST included.

How do I convert PST to GMT?

Pick your source zone as America/Los_Angeles (PST/PDT) and add Europe/London (GMT/BST) as a destination. PST is UTC-8 and GMT is UTC+0, an 8 hour gap in winter, but both regions change for daylight saving on different dates, so the gap is briefly 7 hours in parts of spring and autumn — the converter handles those overlap weeks automatically.

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.