I checked to make sure it wasn't a full moon last night. It wasn't. There must be some other reason to explain the late night zombies that showed up.
FWIW our dog decided she wanted out early this morning as well. She decided to stay out for over an hour and roll in the mud since it has been raining for the last 3 days.
The dog and I thought it was funny since it appeared she had a great time. My wife wasn't laughing.