Calendar / 03
Time Zone Converter and Meeting Planner
Convert a time between cities and time zones with daylight saving handled for the exact date, then use the meeting planner to find the hours that are working time everywhere.
Time Zone Converter and Meeting Planner: Each time is converted with the browser's own time zone database, so each place's daylight saving rules are applied on the date you choose. The planner shows the 24 hours of that day in every zone, coloured by working hours, evening, and night, and marks the hours that suit everyone. Runs 100% locally in your browser with zero server file uploads.
- Category
- Time & calendar tools
- Runs
- In your browser
- Cost
- Free · no sign-up
- Availability
- Ready to use
Runs in your browser with its own time zone data, daylight saving included. Nothing is sent anywhere.
Add a place
Daylight saving and odd offsets
A time zone is not a fixed number of hours from UTC. Most of Europe moves its clocks on the last Sundays of March and October, the United States and Canada on the second Sunday of March and the first Sunday of November, and much of the southern hemisphere in the opposite season. For a few weeks each year the gap between London and New York is four hours instead of five.
Some offsets are not whole hours: India is UTC+5:30, Nepal UTC+5:45, and parts of Australia UTC+9:30 or UTC+10:30. Using the IANA zone name, such as Europe/Berlin, rather than an abbreviation like CET avoids confusion, because the browser then applies each place's own rules for the exact date.
Planning a meeting across time zones
With two or three nearby zones there is usually an hour inside everyone's working day; the planner marks it with a star. Across Europe, the Americas, and Asia-Pacific there often is none, and the fair choice is to rotate who takes the early or late slot rather than asking the same people every time.
Share the link rather than a written time: the recipient sees the meeting in each place and can make their own city the base. Once the meeting starts, the meeting timer keeps the agenda on time, and the alarm clock can remind you a few minutes before.
How to use it
- Add places with one click, or choose any city or time zone from the list by region; the first one is the base.
- Set a date and time in the base zone, or press Now, and read the time in each place.
- In the meeting planner, click an hour where every row is green, then copy the link to share it.
Privacy & limitations
The conversion runs in your browser with its built-in time zone data. Your list of places is kept in this browser, and a shared link carries only the date, time, and time zones.
Related tools
Frequently asked questions
Does it handle daylight saving time?
Yes. The offset is looked up for the date you pick, so a meeting in late March or late October, when Europe and North America change their clocks on different weekends, is converted correctly for that day.
Why does a place show (+1) or (−1)?
It is already the next day, or still the previous day, there compared with the date in the base zone. A call at 18:00 in New York in summer, for example, is 07:00 the next morning in Tokyo.
What counts as working hours in the planner?
9:00 to 18:00 local time is shown in green, 7:00 to 9:00 and 18:00 to 22:00 in a paler colour, and the night in grey. Hours marked with a star are within 9:00 to 18:00 everywhere; if there are none, the pale hours are the least bad choice.
Can I share a meeting time?
Copy link makes an address with the date, the time, and the list of places. Whoever opens it sees the same meeting converted, and can make their own city the base to read it in their time.
Free tool · runs in your browser · no account required