Plan meetings across global time zones.
The Timezone Meeting Planner converts a date and time between multiple time zones simultaneously — showing what the same moment looks like in New York, London, Mumbai, Singapore, and any other city. This is essential for scheduling calls across geographies. Common pitfalls: the US and Europe switch Daylight Saving Time on different dates (about 2 weeks apart each spring and autumn), temporarily changing the gap between time zones. Countries like India, China, and Japan do not observe DST at all, so their offset from Western countries changes twice a year even though their own clocks don't.
UTC (Coordinated Universal Time) is the universal time standard — every timezone is defined as UTC plus or minus an offset. Using UTC in communications removes ambiguity about which local time was intended and avoids DST confusion.
The US switches DST on the second Sunday of March; Europe switches on the last Sunday of March. For the ~2 weeks between these dates, the US–Europe gap is 1 hour different from usual. A recurring 9am New York call will appear 1 hour off-schedule for European participants during this window.
There is no perfect time — the gap is 10.5 hours (EST) or 9.5 hours (EDT). The least-bad overlap is 8–9am ET (6:30–7:30pm IST) — early for the US side, late-but-reasonable for India.