Consultative Committee for Time and Frequency (CCTF)

Scientific advisory committee to BIPM

Appears in 1 story

Stories

International timekeepers vote to abolish the leap second

Rule Changes

Proposed accelerating the end of leap seconds

Delegates from 69 countries voted Thursday in Versailles to abolish the leap second. Starting May 20, 2027, Coordinated Universal Time (UTC) will run continuously, and Earth's rotation will be allowed to drift up to a full hour from atomic time before a leap hour resets it.

Updated Yesterday