Leap second: Difference between revisions

Content deleted Content added

Revision as of 20:15, 21 June 2025 edit Guy Harris (talk \| contribs) Extended confirmed users 79,947 edits →Procedure: Use a citation template. ← Previous edit		Latest revision as of 15:37, 27 July 2025 edit undo DragonflySixtyseven (talk \| contribs) Autopatrolled, Administrators 90,291 edits -
(One intermediate revision by one other user not shown)
Line 24: ==Rationale== {{See also\|ΔT (timekeeping)}} [[File:Deviation of day length from SI day.svg\|thumb\|left\|Deviation of day length from SI -based day with shorter days resulting from faster planetary rotation.]] Leap seconds are irregularly spaced because the Earth's rotation speed changes irregularly. Indeed, the Earth's rotation is quite unpredictable in the long term, which explains why leap seconds are announced only six months in advance. Line 201: \|- ! 2025 \| 0 \|\| 0 \|- ! Year !! 30 Jun !! 31 Dec