Time zones and trips
Time zones explained, meetings across them, the International Date Line, and what to pack for a long-haul flight.
- The International Date Line, explainedWhere the calendar day changes, why it zigzags across the Pacific, how Kiribati and Samoa moved it, and why flying from Auckland to Honolulu lands you yesterday.Read
- Time zones explained: why some are 30 minutes offWhy time zones exist, how railways created them, why India is 5½ hours ahead and Nepal 5¾, why China has one zone, and how daylight saving shifts the gaps.Read
- What to pack for a long-haul flightA long-haul carry-on checklist: sleep kit, comfort, health, entertainment and essentials, plus an arrival bag in case your suitcase is late, and liquid and battery rules.Read
- How to schedule meetings across time zonesFind the overlap in everyone's working hours, check for daylight saving, share the early and late slots, and write invites that can't be misread.Read
Free tools for this
- World clockThe time right now in the cities you care about.
- Time zone converterWhat time is 3 PM in London in Tokyo? Any city to any city.
- Packing list generatorA checklist for your trip, from its length and weather.
- Time zone meeting plannerThe hours that work for everyone, in up to four cities.
- Jet lag calculatorTime difference, days to adjust, and a plan to beat it.
- Trip countdownDays, hours and minutes until you fly. Shareable.