Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun The normally non-existent
thirteenth month of the Westerncalendar .
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
From Latin undecim ("eleven"); formed as logical continuation to December, which in its turn is derived from Latin decem ("ten"), as it was the tenth month in the Roman calendar. It's unclear whether the term was ever used in Classic Latin as a name for an intercalary month.
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