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End of Life Ruby 3.1 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

instance method

Date#day

d.day → fixnum

Alias of #mday

Returns the day of the month (1-31).

Example
Date.new(2001,2,3).mday           #=> 3
See also #mday #cwyear #day_fraction #cweek also in 4.1 · 4.0 · 3.4 · 3.3 · 3.2 · 3.0