Update time zone offset information

activesupport/lib/active_support/core_ext/date_time/calculations.rb

@@ -2,7 +2,7 @@ class DateTime
   class << self
     # DateTimes aren't aware of DST rules, so use a consistent non-DST offset when creating a DateTime with an offset in the local zone
     def local_offset
-      ::Time.local(2007).utc_offset.to_r / 86400
+      ::Time.local(2012).utc_offset.to_r / 86400
     end
 
     # Returns <tt>Time.zone.now.to_datetime</tt> when <tt>Time.zone</tt> or <tt>config.time_zone</tt> are set, otherwise returns <tt>Time.now.to_datetime</tt>.