Undecimber

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

Thing Calendar Month Q547853

Facts

7 properties

Instance of: calendar month
Follows: December^[3]
Followed by: Duodecimber^[4]
Described by source: Vlastenský slovník historický^[5]
Different from: Mercedonius^[7]
Named after: 11^[2]
Used by: Java^[6]

🏷️ Also known as

en Month 13 en 13th month en Undecimber en Undecember ar انديسمبر ar أنديسمبر cs třináctý měsíc cs přestupný měsíc cs Hruden he חודש 13 he אונדצמבר ja 13月 ko 13월 pt Mês 13 pt Undecember ru тринадцатый месяц ru ундекабрь uk тринадцятий місяць zh 13月 zh 十三月

🔖 Identifiers · 1

Freebase ID: /m/0c4rsl

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🔗 Connections

Different from 1

Mercedonius

Follows 1

December

Named after 1

Preceded by (successor) 1

December

Used by 1

Java

← Different from 1

Mercedonius

← References work, tradition or theory 1

Three Heroes and the Princess of Egypt

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Summary

Undecimber is a calendar month^[1].

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

Class ancestry

[1] ↑ Undecimber is an instance of calendar month (Q47018901) [P31, primary]. Wikidata. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). Undecimber. Retrieved November 7, 2026, from https://4ort.xyz/entity/undecimber

MLA “Undecimber.” 4ort.xyz Knowledge Graph, 4ort.xyz, 7 Nov. 2026, https://4ort.xyz/entity/undecimber.

BibTeX

@misc{4ortxyz_undecimber_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Undecimber}}, year = {2026}, url = {https://4ort.xyz/entity/undecimber}, note = {Accessed: 2026-11-07}}

LLM prompt

According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Undecimber — https://4ort.xyz/entity/undecimber (retrieved 2026-11-07)

Canonical URL: https://4ort.xyz/entity/undecimber · Last refreshed: November 7, 2026