10 tools
Time zones
Convert between zones, watch a board of cities, and find the hour that suits everyone. Each tool has its own page. It runs in your browser, and it keeps its inputs in the address bar so you can share the answer.
The tools
Convert a time between zones, keep a world clock of cities, check daylight saving changes and UTC offsets, and find the meeting hour that suits everyone.
Time Zone ConverterOne instant, two clocks. Pick the zones, enter a time, and see what it reads in the other — with the date shift, the offset difference and any daylight-saving trap called out.
World ClockA live board of cities with their offsets, their daylight-saving state, and a read on whether it is morning, working hours or the middle of the night there.
UTC ConverterUTC in, local out, or the other way round — with the offset that applied on that date, which is not always the one that applies today.
Meeting PlannerEvery hour of the next day scored by how many of your cities are inside working hours — so the compromise, when there is no perfect slot, is at least an informed one.
Time Zone DifferenceThe gap between two zones right now, and on any date you pick — because it changes across the year, and the two zones rarely change on the same day.
DST CheckerWhether a zone is on summer time right now, when it next changes, and the exact instant of the change — found by search, to the millisecond.
DST ConverterThe two cases that break scheduling: a wall time that never existed, and one that happened twice. Both are detected and both instants are given.
UTC Offset CalculatorThe current offset for any zone, in `+05:30` form and in minutes, with the standard and summer offsets and the dates it switches between them.
Time Zone LookupSearch by city, by country or by IANA name, and see what a zone actually does: the time there now, its current and standard offsets, its abbreviation and its next transitions.
Time Zone Abbreviation LookupCST, IST, BST — the abbreviations that mean two or three different things each, with every zone that uses them and the offset each implies.