TimerPlanWhen is everyone awake at once?
Four people, four time zones, and one window that works. Finding it in your head is how meetings end up at six in the morning for somebody.
One thing a month worth timing
MonthlyOne thing a month worth measuring or capping with a clock — a payroll trap, a nap length, a meeting that never gets added up. Two sentences and the tool.
Free to use — Pro is for keeping it
This tool, like every other one here, is free and needs no account. A free account keeps three setups and three email alerts. Pro takes the ads off every site we run and lifts that to 200 setups and 50 alerts, adds a public page for any result and lets you embed the tool without our badge.
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How this works
Working windows in UTC
A nine-to-five day in each place, expressed in UTC — the numbers to put in the rows.
| Place | Local day | In UTC (winter) | In UTC (summer) |
|---|---|---|---|
| London | 09:00–17:00 | 09:00–17:00 | 08:00–16:00 |
| New York | 09:00–17:00 | 14:00–22:00 | 13:00–21:00 |
| Berlin | 09:00–17:00 | 08:00–16:00 | 07:00–15:00 |
| Bengaluru | 09:00–17:00 | 03:30–11:30 | 03:30–11:30 |
| Sydney | 09:00–17:00 | 22:00–06:00 | 23:00–07:00 |
These shift by an hour when a country changes its clocks, and the US and Europe do not change on the same date.
Frequently asked questions
Why enter times in UTC rather than local?
Because UTC is the only clock with no daylight saving and no ambiguity, so the arithmetic is a straight comparison. Converting once per person is a small cost for an answer that cannot be wrong by an hour; the alternative is a sheet where two rows silently mean different things.
What if the overlap comes out negative?
Then there is no hour in the ordinary working day that suits everybody, which is a real answer rather than a failure. The usual fixes are to rotate which region takes the awkward hour, to split into two meetings, or to accept that one person joins early — and knowing which of those you are choosing is the point.
Does daylight saving move the answer?
Yes, twice a year, and not on the same date everywhere — the gap between the US and Europe changes for about three weeks each spring. Because rows are in UTC, the fix is to re-convert each person’s local hours after a clock change rather than to adjust the sheet.