Tool 01
Timezone Overlap Calculator — Fair Meeting Hours
A world clock tells you the conversion. This page tells you if Manila has been staying up for six months. Add people, pick a date (DST included), share the link.
Work hours Early / evening Night
How to read this
Green is 09:00–18:00 local. Gold is early or evening. Dark is night. Click an hour to test it. The fairness line names who is paying.
All of this runs in your browser. Names never go to our server. The share link only stores names and time zones in the URL.
How do I find working hours overlap across time zones?
Add each person and their IANA time zone, pick a date, and compare local workday windows. Overlap hours (often shown in green) are when everyone is awake; fairness shows who always gets early or late slots.
Does a timezone overlap calculator account for daylight saving?
Yes. We use IANA time zones and the date you pick, so US/EU DST shifts are included.
Why use a timezone fairness tool instead of a world clock?
World clocks convert. They do not show a pattern of unfairness. Remote teams usually fail on the second part — who always takes the 7am or 11pm call.
Can I share a timezone overlap schedule without an account?
Yes. No signup. Copy the URL (names and zones stay in the link) and send it in Slack.