Pick the places on your route to see the local time there now, the difference from your own clock, and when the clocks next change. Time zones come from the IANA time zone database; your browser works out the times with its own copy of the same rules.
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Where the times come from
Which time zone each country uses is taken from the IANA time zone database, the list most computers and phones use.1 Some countries have more than one, such as Spain and Portugal for their islands; the tool lists each with IANA's own description. For a city we use the first zone IANA lists for its country, unless the city's weather station is within about 300 km of the reference point of one of the country's island zones (the Canary Islands, Madeira or the Azores, in IANA's own words): that puts Santa Cruz de Tenerife, Gran Canaria, Lanzarote and Fuerteventura in IANA's Canary Islands zone. The clock times and clock changes are worked out by your browser, from the time-zone rules built into it. For the EU's summer-time rule, see clock changes and time zones.
Key takeaways
- Time zones from the IANA database; times from your browser.
- In the EU the clocks change on the last Sunday of March and October.
- What we would skip: working out a time difference in your head across a clock-change weekend.
Sources
The time zone list is IANA's. See how we research.
- Internet Assigned Numbers Authority (IANA), Time Zone Database, version 2026e, file zone.tab. Read it. Accessed 12 October 2026. In the public domain.
Times are calculated by your browser; we store none.