Time Zone Converter & Meeting Planner
Pick a date and time in one city and read it instantly in four others. Daylight saving transitions are handled by your browser's own time zone database, so summer and winter offsets are always current.
Source Moment
Everything below is the same instant, shown in different places.
Offsets are not fixed, and that is the whole problem
Most time zone mistakes come from treating an offset as a constant. New York is not "UTC−5"; it is UTC−5 in winter and UTC−4 in summer. London is not always UTC; it is UTC+1 from late March to late October. The gap between London and New York happens to stay at five hours most of the year — but for roughly two weeks each spring and autumn the two regions switch on different dates and the gap becomes four or six hours. Meetings booked during those windows are the ones that go wrong.
This converter never hard-codes an offset. It asks your browser's own IANA time zone database for the offset that applied on the specific date you entered, so a meeting three months out is converted with the rules that will be in force then, not the rules in force today.
Places that do not shift at all
Singapore, Dubai, Mumbai, Ho Chi Minh City, Tokyo and most of Asia do not observe daylight saving. Their offset is stable all year, which means the gap to Europe and North America changes twice a year purely because the other end moved. If you schedule a recurring call between Singapore and London, it will drift by an hour twice a year unless you re-anchor it.
Half-hour and quarter-hour zones
India is UTC+5:30, Nepal is UTC+5:45, and parts of Australia sit on UTC+9:30 or +10:30. Any mental arithmetic that assumes whole hours will be thirty or forty-five minutes out for a significant share of the world's population. Reading the converted time directly avoids the issue.
Booking a meeting people can actually attend
Once you have the converted times, sanity-check them against working hours rather than just the clock. A 09:00 New York start is 22:00 in Singapore and 23:00 in Sydney. Spreading the inconvenience — rotating which region takes the awkward slot — tends to survive longer than a fixed time that quietly excludes one office.