title: where to put time format rules in Rails 3?
body: <p>I am finding myself repeating typing many strftime which I defined.</p>
  
  <p>Having watch Ryan Bates's railscasts ep 32/33( I think), I created a custom option for the to_s method as in Time.now.to_s, so that I can do Time.now.to_s(:sw), where :sw is my custom method, to retrieve "23 Sep 2010, 5:00PM" for example. </p>
  
  <p>But the problem is, I don't know where to put #sw's definition. Should it be in a file in in the initializer folder? Or should it go in application.rb?</p>
  
  <p>Thanks!</p>