[elefont2]

it does, but you cannot predict future legislation.

In 2010, you may not yet know that the timezones will change in 2012, but you might still need to store a 2012 date in your database.

So, the best you can do, if storing in UTC, is store that 2012 date using 2010 timezone rules, as you don't yet know what the 2012 time zone rules are going to be