Northern Hemisphere

Daylight saving time begins in the northern hemisphere between March–April and ends between September–November. Standard time begins in the northern hemisphere between September–November and ends between March–April. Many countries in the northern hemisphere may observe DST.

 

Southern Hemisphere

Daylight saving time begins in the southern hemisphere between September–November and ends between March–April. Standard time begins in the southern hemisphere between March–April and ends between September–November. Many countries in the southern hemisphere may observe DST.

The clock should move ahead (thus, losing one hour) when DST starts, typically in the spring, and falls back one hour (thus, gaining one hour) when DST ends in the fall.