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deepmind.google·6d ago
AI Engineering
Hacker News·26d ago·5 min read
No leap second will be introduced at the end of December 2026
TL;DR
No leap second will be added to Coordinated Universal Time (UTC) at the end of December 2026. This decision is based on the ongoing difference between UTC and International Atomic Time (TAI), which remains at -37 seconds.
✦ Why It Matters
Engineers can plan their time-sensitive applications without worrying about leap second adjustments until at least 2027.
Key Takeaways
- Update systems to align with UTC without leap second adjustments.
- Monitor IERS bulletins for future timekeeping changes.
- Consider implications of stable UTC on time-sensitive applications.
- Communicate with stakeholders about the absence of leap seconds.
Full Summary
Leap seconds are occasionally added to Coordinated Universal Time (UTC) to keep it in sync with Earth's rotation. The International Earth Rotation and Reference Systems Service (IERS) has announced that no leap second will be introduced at the end of December 2026, maintaining the current difference of -37 seconds between UTC and International Atomic Time (TAI).
This decision is based on the ongoing evaluation of the Earth's rotation and its impact on timekeeping. IERS issues a bulletin every six months to confirm whether a leap second will be added or not.
The absence of a leap second simplifies timekeeping for various applications, including telecommunications and navigation systems. Engineers and researchers can rely on a stable UTC without the need for adjustments in their systems during this period.