Q. First nigh with 8 week Maltese, put him in crate at 8pm what time should I let him out in the am?
A. Your pup is likely to have a rough first night, just the transition to a new home and getting used to a new place and smells.
The rule of thumb is age in months plus 1= house many how's they can hold their bladder. So your pup is probably close to every 3 hours before you should take him out to the bathroom. If he sleeps longer, that's ok but you'll probably hear him stir and need to let him put. This is all new to him so have a little patience, it'll take some time to get into routine. Sticking to a schedule will help progress faster.
Don't forget! As soon as a pup wakes, eats, or has very active play session they usually need to go to the bathroom.