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 

1.9.3-p125 :012 > require 'date'
 => true 
1.9.3-p125 :013 > Date::new(2012,02,03)
 => #<Date: 2012-02-03 ((2455961j,0s,0n),+0s,2299161j)> 
1.9.3-p125 :014 >