Time Zone Converter — All Pairs

Every one of these pages answers the same underlying question for a different pair of places: if it’s a given hour in one city, what hour is it in the other, right now, for real? That sounds like it should have one fixed answer per pair, and for a handful of pairs it genuinely does — New York and Toronto, for instance, never disagree, because both follow identical standard-time and Daylight Saving Time rules on the same calendar dates. But for most pairs on this list, the honest answer is “it depends which week of the year you ask,” because the two sides don’t always shift their own clocks on the same schedule as each other.

The reason is Daylight Saving Time, and specifically the fact that it isn’t a single global convention. Some of the 21 anchor zones below observe it (the five US zones, London, Paris, Berlin, Sydney, Auckland, Toronto); others never have (Dubai, Mumbai/Delhi, Singapore, Hong Kong, Tokyo, Beijing) or dropped it in recent years (Sao Paulo); and Moscow settled on a fixed year-round standard time instead of continuing to shift. Pair two zones that both observe DST and their gap can stay almost perfectly steady, wobbling by at most an hour for a week or two each spring and autumn when their transition dates don’t quite line up. Pair one DST zone against one fixed zone and the gap moves by a full, predictable hour twice a year, every year. Pair two DST zones on opposite hemispheres — a US city against Sydney or Auckland, say — and the two shifts can actually add together instead of cancelling out, producing the widest seasonal swings tracked anywhere on this site.

Every fact on every one of these 210 pages is computed at build time from the same Intl/IANA time zone data your browser already ships with — never a fixed, hand-maintained offset table that could quietly go stale the next time a country changes its Daylight Saving Time policy. That means the current UTC offset, whether each side is presently observing DST, the full hour-by-hour conversion table, and the best overlapping business-hours window are all genuine, current calculations, not static copy. It also means a pair like Dubai-to-Mumbai/Delhi, where neither side observes DST at all, is correctly shown as one of the rare genuinely fixed conversions on the whole site — a fact worth knowing on its own, since it means a recurring meeting between those two cities never needs rechecking for a clock change.

The pages are organized below by anchor city or zone, so every one of the 210 pairs is reachable from at least two of the 21 sections — find either side of the conversion you need and its full pairing list is right there. If you already know both cities, searching or scrolling to the more familiar side is usually the fastest route in. Each individual pair page goes further than a bare number: alongside the offset and hourly table, it explains what genuinely drives that specific gap — whether it’s one side’s Daylight Saving Time doing all the moving, both sides moving in step, or (for the widest-swinging pairs) two DST calendars running on opposite hemispheric schedules — plus a realistic best-time-to-meet recommendation and, where relevant, a note on weekend mismatches like Dubai’s Friday-Saturday working week against the Saturday-Sunday weekend used almost everywhere else on this list.