World Clock for Your Global Workday
Pin the cities where the people you study or work with are, and read their current local time, date, and UTC offset. This board shows one moment from this device. It does not convert a time you type.
Loading your cities.
The cities you actually meet
Each card is one city's current local time for the same instant, plus the date and the UTC offset in effect now. The board is not a countdown and not a timer you start. If you only need this device, the clock on this device is the other page.
Build the board
- Type a city, a country, or a zone id such as America/New_York. The matches are names this page already knows.
- The city you add lands at the bottom. If it is already on the board, the row stays marked Added and a second copy is refused.
- Read the cards together. They format one current instant, so one city can already be on the next date while another is still on the previous date.
- Reorder a city or take it off the board. This browser keeps that order for the next visit. Remove every city and the board stays blank.
One moment, several local clocks
Seoul is stored as Asia/Seoul, New York as America/New_York, and London as Europe/London. The page does not store a fixed UTC+9 beside Seoul. It asks the browser to format now in that named zone, and the card prints the hours, the date, and the offset that formatting returns.
Why London's offset is not the same all year
London can show UTC+0 in January and UTC+1 in July because Europe/London moves for daylight saving. New York can show UTC−5 or UTC−4 for the same reason. Asia/Seoul does not move, so Seoul stays UTC+9. The card reads that shift from your browser's zone data. This site has no calendar of the changeover dates.
The offset belongs to this moment
A saved city is the time zone name, such as America/New_York, not a frozen UTC−5. The offset is worked out each time the page shows the clock. Los Angeles and San Francisco can both sit on the board even though they share America/Los_Angeles. Zones of a half hour or a quarter hour are included, such as India at UTC+5:30 and Nepal at UTC+5:45.
A board for a weekly call
- Keep Seoul, London, and New York on the board before a weekly call, and read which of those clocks are still on today's date.
- When Seoul has just moved into a new date, London and New York can still show the previous date. The cards compare those local dates with this device, at one instant.
- Read the UTC offset in effect now before you write a time down. A meeting time you chose, rather than the time it is now, belongs on the time zone converter.
What this board does not decide
- The first cities come from the language of this page. Nothing on the board is chosen from your location or your IP address.
- Each card is this device's clock, printed in that city's zone. The page does not call a time server for a second opinion.
- Come back in this same browser and the order is still there. It is not an account, and it is not uploaded. Clear site data and the board is gone.
- Twelve cities is the cap. Take one off the board before you add past that cap. A board with no cities stays blank.
- Typing a meeting time is the job of the time zone converter, including that moment across several cities. This board only shows the time it is now.
Questions about the cities on your board
How do I keep only the cities I actually meet with?
Search, add, reorder, and remove. The board holds up to 12 cities. A city already on the list is not added again. Clearing the list leaves it empty.
Why do these cards move together when a minute passes?
Every card formats one instant from this device in that city's time zone. The date and the UTC offset on the card belong to that same instant.
Why does London show a different UTC offset in July than in January?
London's offset changes when that region starts or ends daylight saving. The city stays on Europe/London. This site does not keep a separate calendar of those dates. The browser's time zone data supplies the offset for the current instant. Seoul's Asia/Seoul stays UTC+9.
Where do I put a meeting time I chose, rather than the time it is now?
On the time zone converter. This board shows current local time only. It does not take a date and time you type, and it does not shade office hours.
Does this board read my location to pick the first cities?
No. It does not read your location or your IP address. The clocks on a new board follow the language of this page.
What stays when I come back tomorrow?
The list and its order, in this browser. They are not stored in an account. Clearing site data removes them, and an empty list stays empty.
Can two cities share one time zone and still be separate cards?
Yes. Los Angeles and San Francisco can both stay on the board on America/Los_Angeles. The saved record is the time zone name, not a frozen offset such as UTC−5.