Because Earth’s rotation is not perfectly stable, an occasional “leap second” is added to keep official time in sync, resulting in a 61-second minute in some years.
Source: one
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Fact-a-Day
January 6, 2026
January 6, 2026
Because Earth’s rotation is not perfectly stable, an occasional “leap second” is added to keep official time in sync, resulting in a 61-second minute in some years.
Source: one
