Auto-updating auto entered calculations
I have just changed several fields which were being unused to auto enter a date based (each with a different lead time) based on when our bands have a show.
So they look similar to this
Show Date Send Media List Contact Bloggers Contact guest list
6/1/11 4/1/11 5/1/11 5/20/11
Where you only enter the show date and the other dates auto-enter. The problem is, all those fields used to be blank and I need them to all fill in with what their data SHOULD show. And even though I've applied the auto-enter functionality to them am i right that this functionality only applies to newly created records. How can I fill in the several hundred old date fields with their proper information now?