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Maintenance Ruby 3.4 gets fixes, but no new features. Switch to Ruby 4.0 →

instance method

Date#mday

() -> ::Integer
mday → integer

Returns the day of the month in range (1..31):

Example
Date.new(2001, 2, 3).mday # => 3
See also #leap? #mjd #ld #mon also in 4.1 · 4.0 · 3.3 · 3.2 · 3.1 · 3.0