Time zone converter

Line up your cities by the hour and click a column to see that time everywhere. Daylight saving is handled per city.

Loading your time zones…

How the converter works

A time zone converter answers one question: when it is this time here, what time is it there? This one answers it for every city at once. Instead of converting pairs, you see a whole day side by side, so finding an hour that works in San Francisco, London and Bangalore is a glance, not a calculation.

Step 1
Add your cities
Search by city or time zone name. Every IANA zone is available, from Honolulu to Auckland, and your list is saved on this device.
Step 2
Read across the row
Each city gets 24 hours lined up against your home city. White cells are working hours, grey is early or late, dark is the middle of the night.
Step 3
Pick the hour, copy the times
Click a column to see that moment in every city, then copy the list, dated per city, into the email or Slack thread you are scheduling in.

Daylight saving, per city

Most mistakes in cross-time-zone scheduling come from daylight saving. The United States and Europe change clocks on different weekends, India and South Korea never change, and parts of Australia shift in the opposite direction. The converter uses each city's own IANA time zone rules, so a date in March or October shows the offsets that will actually be in force that day, not today's.

Default cities

The planner opens with five cities that cover the common working-day overlaps. Remove any of them, or add your own from any time zone.

Default cities and their UTC offsets in 2026
City	15 January	15 July
San Francisco, United States America/Los_Angeles	UTC−8	UTC−7
New York, United States America/New_York	UTC−5	UTC−4
London, United Kingdom Europe/London	UTC+0	UTC+1
Bangalore, India Asia/Kolkata	UTC+5:30	UTC+5:30
Seoul, South Korea Asia/Seoul	UTC+9	UTC+9

One meeting, five cities

When it is 9:00 am in San Francisco on 15 July 2026, it is 12:00 pm in New York, 5:00 pm in London, 9:30 pm in Bangalore and 1:00 am the next day in Seoul. In January it is 10:30 pm in Bangalore and 2:00 am the next day in Seoul instead: San Francisco moves its clocks back an hour for winter, and Bangalore and Seoul keep theirs.

A 9:00 am meeting in San Francisco, shown in each default city
City	15 January 2026	15 July 2026
San Francisco	9:00 am	9:00 am
New York	12:00 pm	12:00 pm
London	5:00 pm	5:00 pm
Bangalore	10:30 pm	9:30 pm
Seoul	2:00 am +1 day	1:00 am +1 day

Time zone converter FAQ

How do I convert a time between two cities?

Add both cities, then click the hour column for the time you have in mind. Every row shows that same moment in its own city, and the day markers along the strip show where the date rolls over, so you can read the conversion straight across.

Does the converter handle daylight saving time?

Yes. Each city uses its own IANA time zone rules, so a city that is in daylight saving shows the shifted hour while one that is not stays put. Pick a date in the future and the grid reflects the transitions in force on that day.

How do I find a meeting time that works across time zones?

Line up every participant’s city, then look for a column where all rows fall in the daytime shade. Working hours are white, early morning and evening are grey, and the small hours are dark, so an overlap is easy to spot.

Can I share the times with the people I am scheduling with?

Yes. Copy times puts the selected moment in every city on your clipboard, one line per city, ready to paste into an email or Slack message.

Is the time zone converter free?

Yes. It runs in your browser, needs no account, and remembers your cities on this device. Blockit, the scheduling agent that does the time zone arithmetic for you in email and Slack, has a separate 30-day free trial.

Or stop converting time zones altogether

The converter is for the times you want to check by hand. Blockit is for everything else: CC it on an email or Slack thread and it proposes times that work in every participant's time zone, handles the daylight saving edge cases, and sends the invite. It works with Google Calendar and Outlook, and the first 30 days are free.

Try Blockit for free