Mastodawn

NASA Confirms China’s Three Gorges Dam Has Slowed Earth’s Daily Rotation: https://orbitaltoday.com/2025/09/03/nasa-confirms-chinas-three-gorges-dam-has-slowed-earths-daily-rotation/

#leapsecond #time #nasa #china #utc #atomictime

Gravitas Nov 18

Leap Second: Last Week Tonight with John Oliver (HBO)

https://peertube.gravitywell.xyz/w/mm1EyeEuzNAPAMs6gjda2T

Leap Second: Last Week Tonight with John Oliver (HBO)

PeerTube

Marcus Müller Jul 29, 2025

Learned this from a colleague:
No leap second this year: https://datacenter.iers.org/data/latestVersion/bulletinC.txt
#time #leapsecond

ScienceActually Jan 26, 2025

Usually added at New Year’s to align atomic clocks with Earth’s irregular rotation, the leap second will be discontinued by 2035. This change eliminates disruptions to global systems like GPS and telecommunications, allowing for uninterrupted timekeeping.

#science #sciencefacts #leapsecond #earthrotation #newyears #HappyNewYear #happynewyear2025

Benjamin Carr, Ph.D. 👨🏻‍💻🧬Jul 9, 2024

Time Lords decree: The International Earth Rotation and Reference Systems Service (#IERS) announced on Thursday there will be no #leapsecond added to #2024.
#Earth's rotation slowed in recent decades, creating a need for 27 leap seconds introduced between 1972 and 2016. Our planet's spin has sped up a little since – which is why we've not had a leap second added for a few years.
https://www.theregister.com/2024/07/05/iers_decrees_no_leap_second/

Time Lords decree: No leap second needed in 2024

Let's not get ahead of ourselves, even if Earth is spinning out

The Register

Tomi Jul 3, 2024

https://qntm.org/leap one small step for mankind, one big leap for a developer #LeapSecond #DateTimeFun

All I want for Christmas is a negative leap second @ Things Of Interest

Matt Willemsen Mar 29, 2024

Climate change has slowed Earth’s rotation — and could affect how we keep time
https://www.nature.com/articles/d41586-024-00932-w #ClimateChange #TimeKeeping #LeapSecond

Climate change has slowed Earth’s rotation — and could affect how we keep time

The effect of melting polar ice could delay the need for a ‘leap second’ by three years.

Matt Willemsen Mar 29, 2024

Melting ice solves leap-second problem — for now
https://www.nature.com/articles/d41586-024-00850-x #TimeKeeping #LeapSecond #ClimateChange #IceSheets #UTC #tai #UT1

Melting ice solves leap-second problem — for now

Two perspectives on how climate change is affecting timekeeping.

Infrapink (he/his/him)Mar 29, 2024

According to a recent paper, due to fluctuations in the rotation of Earth's core, Earth';s rotation is speeding up. The final minute of 2026 would only have 59 seconds in order to keep UTC synchronised with Earth's rotation.

But #ClimateChange has melted so much of the polar ice caps that the distribution of Earth's mass has changed. This has delayed the negative #LeapSecond by three years, to 2029.

https://www.nature.com/articles/d41586-024-00850-x
https://www.nature.com/articles/d41586-024-00932-w

Original (paywalled): https://www.nature.com/articles/s41586-024-07170-0