For nearly 400 years, we've been adding leap days to keep our calendar aligned with Earth's orbit.
But there’s also a system of occasionally adding leap seconds to keep atomic time (and things that rely on it, like GPS) aligned with Earth's rotation. That could all change soon.
https://theconversation.com/leap-seconds-have-helped-keep-clocks-synchronized-with-earths-rotation-but-their-time-may-be-over-heres-why-291017
The Conversation U.S.
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2026-10-13 22:00:35 UTC
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2026-10-13 22:00:35 UTCEvent JSON
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