# Undecimber

> name for a thirteenth month in a calendar that normally has twelve months

**Wikidata**: [Q547853](https://www.wikidata.org/wiki/Q547853)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Undecimber)  
**Source**: https://4ort.xyz/entity/undecimber


## References

1. Freebase Data Dumps. 2013