How do I change the pick up date and time?

if it already booked You will need to do a modification to the stay. Once in modification you can adjust the times. The owner will then need to approve it first.

**A lot of times, I don't bother with sending a modification and bothering the owner with have to approve the changes. What I will do, is write it down in out conversation so it is written down and communicated between myself and the owners. I typically will do this when I am confirming the reservation with the owners.
(wanted to add the note that I only will do this when the Owner and I have already previously agreed on a time.)