World Clock

How to use

1. Review the default city clocks or search for a city to add.
2. Use the 12-hour or 24-hour option to match how your team writes times.
3. Set the reference date in the working-hours overlap section.
4. Read the highlighted source-city hours when every selected city is between 09:00 and 17:00.
5. Remove cities you no longer need; the remaining cities are saved in this browser.

A world clock is for “now”; an overlap is for planning

A world clock shows the same instant in several places. This page also checks each selected city against a local 09:00–17:00 workday and highlights reference-city hours that work for everyone. The result is a planning aid, not an availability promise: confirm holidays, individual schedules, and the meeting duration with attendees.

For one exact date and time between two places, use the linked time zone converter. It resolves a source clock time into an instant, which is important around daylight-saving changes and when the local date differs.

Why city time zones beat abbreviations

Names such as America/New_York and Europe/London carry regional daylight-saving rules. Abbreviations can be ambiguous: CST can refer to North American Central Time or China Standard Time, and IST is used for more than one region. The clocks here use the IANA time-zone data supplied by your browser for the current instant and the selected planning date.

UTC offsets can include minutes rather than whole hours. India is UTC+05:30 and Nepal is UTC+05:45, so a city clock is safer than rounding a remembered difference. A displayed date and weekday also matter because two cities can be on different calendar days at the same instant.

Frequently asked questions