# leap second

> extra second inserted or removed to keep civil time in sync with the Earth's rotation

**Wikidata**: [Q194230](https://www.wikidata.org/wiki/Q194230)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Leap_second)  
**Source**: https://4ort.xyz/entity/leap-second


## References

1. [Source](https://www.nature.com/articles/d41586-022-03783-5)
2. Freebase Data Dumps. 2013
3. BBC Things