Question 1

What is Daylight Saving Time?

Accepted Answer

DST is the practice of setting clocks forward by one hour during summer to make better use of daylight. Start and end dates vary by country.

Question 2

What is the difference between UTC and GMT?

Accepted Answer

GMT is an astronomical standard based on Earth's rotation. UTC is a precise time standard based on atomic clocks. They are nearly identical in daily use.

Question 3

What time zone is China?

Accepted Answer

China uses Beijing Time, corresponding to UTC+8 (Asia/Shanghai). The entire country uses the same time zone without DST.

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