In some countries, a special time change takes place twice a year. It is called Daylight Saving Time (DST).*

DST happens because seasons have different daylight hours. In summer, the sun sets very late. But in winter, it gets dark very early.

So, these countries use DST to have more balance. In March, they set their clocks forward by one hour. For example, 5 p.m. suddenly becomes 6 p.m. This way, the sun does not set too late.

Then in November, these countries set their clocks back by one hour. Then, they can have more daylight hours during winter. People can enjoy more sunlight.

Countries With DST

Seventy countries practice Daylight Saving Time. They are mostly in North America,* Europe,* and South America.* Many countries in Asia* do not take part in it.

Problems With DST

Some people do not like Daylight Saving Time. They say it is hard to adjust to the changes. It sometimes affects their sleep.

* Daylight Saving Time (DST) 서머 타임, 일광 절약 시간

* North America <대륙> 북아메리카

* Europe <대륙> 유럽

* South America <대륙> 남아메리카

* Asia <대륙> 아시아