Convert a wall-clock time between zones with daylight-saving-accurate offsets, see when a local time is skipped or repeated by a clock change, and find the working-hours window everyone shares.
Change the inputs that matter to your decision. Optional assumptions stay collapsed until you need them.
The date and time are read in the source zone, whatever zone your own device is in.
Used to find the window when everyone is available.
09:00 AM in New York is 02:00 PM in London.
New York 09:00 AM–12:00 PM · London 02:00 PM–05:00 PM
| New York | 09:00 AM · Sat, Aug 8, 2026UTC-04:00 · EDT |
|---|---|
| London | 02:00 PM · Sat, Aug 8, 2026UTC+01:00 · GMT+1 |
| Meet in New York | 09:00 AM – 12:00 PMInside working hours for everyone |
| Meet in London | 02:00 PM – 05:00 PMInside working hours for everyone |
Offsets, abbreviations, and the difference are all read from the IANA time zone database for this exact instant, so daylight saving is applied consistently to every value shown.
Practical notes about the inputs, assumptions, and result.
The source zone you select, never your own. Enter 09:00 with New York as the source and it stays 09:00 in New York whether you are reading this from Berlin, Delhi, or Auckland.
Daylight saving. New York and London are usually five hours apart, but for roughly three weeks each March the US has already sprung forward while the UK has not, so the gap narrows to four hours. Every offset here is read for the exact instant you entered, so the difference always matches the two clocks shown.
When clocks spring forward, an hour of local time is skipped. In New York on 8 March 2026, 02:30 does not exist — the clock goes straight from 01:59:59 to 03:00:00. Rather than silently move your input, the converter says so and shows the first valid moment after the change.
When clocks go back, an hour repeats. 01:30 occurs twice in New York on 1 November 2026, once on daylight time and once on standard time. The converter flags the ambiguity and uses the earlier of the two.
The 48 hours around your chosen instant are scanned in quarter-hour steps, and the longest continuous run where every selected zone is inside your working day is reported. Add a third zone to see how much overlap it costs; sometimes the honest answer is that none exists.
Other tools in travel & distance.
Price a trip for gasoline, diesel, E85, LPG, or an electric vehicle, split the cost across passengers, plan refuelling stops, and compare two vehicles side by side.
Measure the straight-line, road, and flight distance between two cities or any two coordinates, with driving estimates shown only where a road route actually exists.
Estimate an annual per-person carbon footprint from driving, flights, home energy, and diet, then see which single change would cut the most, sized from your own numbers.