Event anniversary

Leap second

Took place on June 30, 1972

54

Years ago

55th anniversary next

The 55th anniversary falls on June 30, 2027, in 248 days.

A leap second (sometimes called intercalary second) is a one-second adjustment occasionally applied to Coordinated Universal Time (UTC), to accommodate the difference between International Atomic Time (TAI), as measured precisely by atomic clocks, and observed solar time (UT1), which varies due to irregularities and…

Text from Wikipedia, licensed under CC BY-SA 4.0

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Leap second

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