gistfile1.rb

require 'smart_month'
SmartMonth::Rulesets.load_file("/path/to/rulsets.yml")

Month.december.christmas #=> Date object containing December 25th of the current year.
Month.december(2010).christmas #=> Date object containing December 25th, 2010.

Month.december.each do |day|
 if day.is_christmas?
  puts "yay!"
 else
  puts "boo!"
 end
end