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…
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