how does daylight saving time work

Daylight Saving Time is a seasonal practice where clocks are advanced by one hour in the spring and set back by one hour in the fall to shift daylight hours toward the evening.

The Mechanics of the Switch. In the spring, clocks jump forward from 1:59:59 to 3:00:00, effectively skipping one hour of time. In the fall, clocks jump back from 1:59:59 to 1:00:00, causing that hour to be repeated.
Timing of Transitions. Transitions are usually scheduled for early morning hours on weekends to reduce the impact on daily routines and business operations.
Hemispheric Differences. Because seasons are reversed in the Northern and Southern Hemispheres, the timing of DST is also reversed, with the Southern Hemisphere typically observing it from September/November to March/April.
Purpose and Debate. Proponents argue that shifting daylight to the evening hours can reduce energy consumption by decreasing the need for artificial lighting, though the actual energy savings remain a subject of debate.