How Daylight Saving Time Works

Why We Change the Clock

Daylight Saving Time (DST) shifts the clock forward in spring and back in autumn. The original purpose was to make better use of daylight during active hours, especially before modern lighting became widespread.

The Logic Behind DST

The Global Debate

Many countries are phasing out DST because the benefits are unclear and the disruptions to sleep patterns and schedules can have measurable impacts on health and productivity.

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