Leap second

Hold

Techniques

An occasional one-second adjustment added to UTC to keep it aligned with Earth rotation.

Why it's here

Placed in Hold: 1 article(s) of evidence from 1 source(s), led by research-stage coverage, with 0 in the last 30 days. Confidence 24%. Low accumulated evidence, so it defaults conservatively pending more signal.

Evidence (1)

4Hacker News·7/9/2026research
No leap second scheduled for December 2026
The International Earth Rotation and Reference Systems Service has announced that no leap second will be introduced at the end of December 2026. This means UTC will continue without an extra second at that date, reflecting the current assessment of Earth’s rotation timing.