How can I create a new Date instance in Ruby

According to Date documentation:

require 'date'

Date.new(2001,2,25)           #=> #<Date: 2001-02-25 
Date.jd(2451966)             #=> #<Date: 2001-02-25 
Date.ordinal(2001,56)        #=> #<Date: 2001-02-25 
Date.commercial(2001,8,7)    #=> #<Date: 2001-02-25 
Date.parse('2001-02-25')     #=> #<Date: 2001-02-25 
Date.strptime('25-02-2001', '%d-%m-%Y') #=> #<Date: 2001-02-25 
Time.new(2001,2,25).to_date   #=> #<Date: 2001-02-25