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Rule "Impossible dates (April 31st, etc.)"

This is one of many errors that LanguageTool can detect.

Description:	Impossible dates (April 31st, etc.)
Message:	\5 is not a leap year, so there are only 28 days in February. Are you sure this date is correct?
Category:	Semantics (ID: SEMANTICS)
Incorrect sentences that this rule can detect:	She will join us on 29/02/2022.
Correct sentences for comparison:	In March 37, Tiberius died and Agrippina's remaining son Caligula succeeded as emperor. On 2 September 31 BC the naval forces of Octavian, led by Marcus Vipsanius Agrippa, met those of Antony and Cleopatra at the Battle of Actium. In September 31 B.C.E. the naval forces of Octavian, led by Marcus Vipsanius Agrippa, met those of Antony and Cleopatra at the Battle of Actium. Sold 25 Calls ENE April 35.0 @ $1.45 opening order Have a great weekend. Be that as it may, she expired on 17 October 33. It has a population growth rate of 0.925% (2010 est.), with a birth rate of 17.81/1000 population, death rate of 9.35/1000, and net migration rate of -2.13 migrant(s)/1,000 population.
ID:	TWELFTH_OF_NEVER [16]
Version:	6.8-SNAPSHOT (2025-10-27 22:33:07 +0100)