another Bulk question (Bulk Template edit)

[Frequency Fit]

As the sun shines longer here, starting May-ish, the Venues change to a slightly later start time (for 4 or so Months). These are weekly gigs, so that's over 65 individual gig entries to edit.

 ●Is there any way to 'Bulk change this?

I've tried editing/changing the Template, but that doesn't work for already listed, saved gigs. It only changes it for future gigs that I add. No big deal if not, I just thought I would ask.

Thanks for all your hard work...much appreciated!

mil gracias!