What is daylight saving time?

Daylight saving time (DST) is the practice of advancing clocks by one hour during warmer months so that evenings have more daylight. Clocks "spring forward" in spring and "fall back" in autumn.

How many countries observe daylight saving time?

Approximately 70 countries currently observe some form of daylight saving time, primarily in North America, Europe, and parts of Oceania. Most of Africa, Asia, and South America do not observe DST.

Do all US states observe daylight saving time?

No. Hawaii and most of Arizona do not observe daylight saving time. The US territories of American Samoa, Guam, the Northern Mariana Islands, Puerto Rico, and the US Virgin Islands also do not observe DST.

Daylight Saving Time Transitions

See when clocks spring forward and fall back in every country that observes daylight saving time. Each country page lists exact transition dates and clock changes for the current year.

Popular CountriesDaylight saving time transitions

All Countries with DST70 countries

Countries without DST174 countries

These countries do not observe daylight saving time and keep the same UTC offset year-round.

Frequently Asked Questions

What is daylight saving time?: Daylight saving time (DST) is the practice of advancing clocks by one hour during warmer months so that evenings have more daylight. Clocks "spring forward" in spring and "fall back" in autumn.
How many countries observe daylight saving time?: Approximately 70 countries currently observe some form of daylight saving time, primarily in North America, Europe, and parts of Oceania. Most of Africa, Asia, and South America do not observe DST.
Do all US states observe daylight saving time?: No. Hawaii and most of Arizona do not observe daylight saving time. The US territories of American Samoa, Guam, the Northern Mariana Islands, Puerto Rico, and the US Virgin Islands also do not observe DST.