awscreative on "Globally change /2012/ to /2013/ on all posts"

I have each post dated to a each day of the week ie 30 or 31 posts per month.
at 1am of each day, a new devotional is posted. They are shown
http://spiritualexpressions.info/2012/12/december-22/
All I need to do for 2013 is change 2012 to 2013 in all 352 posts