if you don't have a ridiculously high number of record make a two column report of those two field filtered by where the dates do not match.
Then use grid edit and click the black column heading for the formula field to highlight the column and then right click to copy and then right click the black column heading in the scar field and paste.
You should be able to update 500 record each go round and the report will refresh when you save to be 500 records fewer.
------------------------------
Mark Shnier (YQC)
Quick Base Solution Provider
Your Quick Base Coach
http://QuickBaseCoach.commark.shnier@gmail.com
------------------------------