okay so recently made changes to our periods for the second half of the year to move from calendar months, to close last saturday of every month. i have the periods updated, and all historical transactions that needed to be modified updated (this change was request into july and we needed to update from 5/15 so there were a good amount of transactions that needed to be updated), now my only issue is JE reversals cannot be edited so i'm left with ~700 JE that i cannot move to the correct period. is there any way around this?

Maybe you have already tried this but if you go to the original journal, you can generally edit the reversal date from there if the period is open. You'd be able to do it in mass via a CSV import or via an editable search showing only those entries.