When does Daylight Saving Time start and end?

In the United States, DST begins on the second Sunday of March and ends on the first Sunday of November. In Europe, it usually runs from the last Sunday of March to the last Sunday of October.

Which countries use Daylight Saving Time?

Around 70 countries use DST, including most of North America, Europe, and parts of Oceania and South America. Many countries close to the equator do not use it.

What is Daylight Saving Time (DST) and How Does It Work?

Q: What is Daylight Saving Time?

Daylight Saving Time is the practice of advancing clocks by one hour during warmer months so that darkness falls later in the evening.

What is Daylight Saving Time?

Daylight Saving Time (DST) is the practice of setting clocks forward by one hour during warmer months so that darkness falls later in the day.

During DST, clocks usually move forward in spring and back in autumn. In practical terms, the sun rises and sets one hour later on the clock than it would under standard time.

Remember

Spring forward: clocks move ahead one hour.
Fall back: clocks move back one hour.

The History of DST

The idea of daylight saving is often linked to Benjamin Franklin, but the modern concept was seriously advocated much later. DST was first adopted widely during World War I as a way to conserve energy.

After that, many countries dropped it, then brought it back in later periods of fuel shortage or policy change. That history helps explain why DST rules still differ so much around the world.

Which Countries Use DST?

Roughly 70 countries use some form of daylight saving time, but the practice is far from universal.

Countries that use DST

- United States (most states)
- Canada (most provinces)
- Most of Europe
- Australia (some states)
- New Zealand

Countries that do not use DST

- Japan
- China
- India
- Most of Africa
- Most of Asia

Countries close to the equator usually do not observe DST because the amount of daylight changes very little over the course of the year.

When Does DST Start and End?

The dates vary by region:

United States: second Sunday in March to first Sunday in November

European Union: last Sunday in March to last Sunday in October

Australia: first Sunday in October to first Sunday in April

The DST Controversy

Daylight saving time remains controversial. Supporters point to longer evenings and potential economic benefits, while critics focus on sleep disruption and operational confusion.

Arguments for DST

- More daylight for evening activities
- Potential energy savings
- Reduced crime in some evening hours
- Economic benefits for retail and recreation

Arguments against DST

- Sleep and circadian disruption
- Health risks around clock changes
- Limited modern energy savings
- Confusion for international scheduling

The Future of DST

Many governments continue to review whether DST should remain in place. The rules may keep changing as regions weigh health, economics, and public preference.

How World Clock Today Handles DST

World Clock Today automatically accounts for DST changes. If a city is currently observing daylight saving time, the local time display reflects that status so you see the correct time without manual calculation.