LanguageTool Community

<< return to list of rules

Rule "Invalid date, like 'February 31, 2014'"

This is one of many errors that LanguageTool can detect.

Description: Invalid date, like 'February 31, 2014'
Message: The month of \1 only has 30 days.
Category: Semantics (ID: SEMANTICS)
Link: https://languagetool.org/insights/post/date-formats/#commas-in-dates
Incorrect sentences
that this rule can detect:
  • It happened on November 31, 2014.
Correct sentences
for comparison:
  • It happened on November 30, 2014.
  • Band 89, Nr. 9, 2002, S. 1531–1546, DOI: 10.3732/ajb.89.9.1531.
ID: INVALID_DATE [1]
Version: 6.6-SNAPSHOT (2025-01-11 22:33:10 +0100)