Originally Posted by
m907
The middle of the week is traditionally weak at all locations because people who are staying the week picked up on Monday and haven't returned it yet.
That was pre-COVID when business travel was most of rental car demand. These days, the demand is mostly leisure oriented on weekends although I imagine business travel has to be picking up again.
My experience at EWR has been decent selection during middle of the week and empty lots on the weekend.