How do I change a dog walking job that was accidentally booked for an old request?

You can either call Rover or email support@rover.com and they will change the booking dates, it usuallyt happens within 24 hours.

I had to change the date on a boarding which was already confirmed, paid for. I contacted Rover. They said to click "cancel." Describe in the comments box how the date should change. Someone at Rover reviews it within 48 hours and will change the date.