Standard time and daylight saving · tz database 2026e
Winter and Summer Time Zones
Every country and region is coloured by the clock it keeps. Switch between winter (standard time) and summer (daylight saving time) to see how the map and the population ranking change. Places with the same colour share the same clock.
Faint lines mark every 15° of longitude, which is one hour of sun time. Small circles mark island groups too small to draw at this scale. Click a zone or a chip to keep it highlighted. Swipe the map sideways to see all of it.
Population by time zone
| # | Zone | People | Share of world | In summer | Main places |
|---|
How this was worked out
Winter and summer clocks
- Winter shows every place on its standard time. Summer shows every place on its daylight saving time where it has one; places without daylight saving keep the same clock in both views.
- Each place is shown in its own season. North of the equator, summer means roughly March to October. In Australia, New Zealand, Chile and other southern places, summer means roughly October to April.
- Most of Asia, Africa and South America never change their clocks.
- British Columbia, Alberta and Manitoba switch to permanent daylight time on 1 November 2026, so they keep UTC−7, UTC−6 and UTC−5 all year. Morocco and Western Sahara moved to permanent UTC+0 on 20 September 2026.
- Arizona has no daylight saving, so it shares UTC−7 with Colorado in winter and with California in summer. Mexico only changes clocks in some towns on the US border.
- China uses UTC+8 nationwide, so Xinjiang is drawn on UTC+8 rather than its informal local time. Crimea is drawn on UTC+3, as the tz database records it, while Ukraine’s population figure is counted with the rest of Ukraine.
- Offsets come from the IANA tz database (2026e), using the rules for 2027. Zone boundaries come from timezone-boundary-builder 2026e, and coastlines from Natural Earth. Antarctica is left off.
Where the population numbers come from
- Country totals are World Bank estimates for 2025. Taiwan uses its household register (June 2026). Western Sahara is an approximate 0.6 M.
- Countries that span several zones are split by state or province: US Census 2025 estimates, Rosstat 2025, IBGE 2022 census (Brazil), INEGI 2020 census (Mexico), Indonesia’s 2020 census, Statistics Canada 2021 census, ABS March 2026 (Australia) and 2019 provincial estimates for DR Congo.
- States split between zones (the Florida panhandle, western Kentucky, East Tennessee, El Paso and others), Mexico’s border towns and outlying islands (Canaries, Azores, Bougainville, Galápagos and others) use rounded figures, so treat the smallest zones as approximate.
- The zone totals add up to the World Bank’s world figure. Tiny territories with no World Bank estimate (each under 20,000 people) are left out.