Default Expiration Date

All of my business directory listing expire on 12/31/2019. But in the package setup, I can only set an expiration relative to when the listing was created (30 days, 2 months, etc). How can I set a fixed expiration for all new listings?

I found where I can manually edit expiration dates for “Places” but want to avoid manually editing each entry if possible.

Also noticed that when I manually edit any field for a place, and then save, the expiration date decreases each time I save. 12/30, 12/29, 12/28, etc. Any idea why?