ruby file to print out a sequence of dates .. laaazy

gistfile1.rb

#!/usr/bin/ruby
require 'date'

sd = Date.parse('2011-06-8')
ed = Date.parse('2011-06-15')
sd.upto(ed) { |date|
        (0..23).each do |hour|
                printf("%s:%02d\n",date.strftime('%d/%b/%Y'),hour)
        end
}