title: Ruby on Rails changing time zones for application
body: <p>My application has been running for over 6 months in the UTC time zone. This means all ActiveRecord and MongoDB objects have been created in the UTC time zone. Curious enough, if I go ahead and change the applicable setting in application.rb:</p>
  
  <pre><code>config.time_zone = 'Eastern Time (US &amp; Canada)'
  </code></pre>
  
  <p>Will this convert the records that were created in UTC to the EST time zone? What about the MongoDB records? (I use Mongoid as my Ruby driver). Is it as simple as flipping a switch in application.rb and that's it?</p>