Time Zone Converter

What is a time zone converter?

A time zone converter shows the current time in up to three zones at once and finds the window where everyone’s working hours overlap — the meeting time that doesn’t ruin someone’s evening.

How this converter works

• Pick up to three time zones from the list.
• It shows the current local time and date in each zone.
• It scans the 24-hour day for hours when all zones are between 9am and 5pm.
• Daylight saving time is handled automatically by the browser’s time-zone database.

How to use the result

1. Use the overlap window as your starting point for scheduling — then check the actual invite.
2. If there’s no overlap (common for NY–Sydney), pick the least-bad hour and alternate which side bends.
3. Confirm the meeting time in each attendee’s local zone — calendar apps usually do this for you.
4. Re-check near DST transitions, when offsets shift by an hour.

What’s the best time for a meeting across time zones?

For US–Europe, a mid-morning US / afternoon Europe window often works — around 9–10am New York is 2–3pm London. US–Australia is the hard case: the overlap is tiny or nonexistent, so alternating early-morning/late-evening times keeps it fair.

Common mistakes

• Forgetting DST. The offset between two zones changes across the year, so a time that works in January may not in July.
• Using a country name instead of a city. Countries span multiple zones — always anchor to a city.
• Assuming “9am your time” is 9am theirs. The overlap tool exists precisely because it isn’t.

Time-zone math is date-time arithmetic — the business days calculator handles the scheduling side, and the age calculator the calendar-date side, for the same kind of cross-time planning.