Yup, I remember all too well this stage with my Puma pup!!! It was as if at night, Puma suddenly went from sweet lil doggie to monster shark who was the crankiest, shark biting flash eating monster! So bizarre to watch and it happened, like you said, at night!
But like the others here have said--it is the whole over tired exhausted puppy syndrome. Time for bed, much like a tired out toddler. No need to try any calming/training at this point, just send sweet monster puppy off to her bed! I wouldn't mess with time outs or anything, she just needs quality sleep! And lots of it. Puppies need something like 18 hours of sleep per day.
When we saw this behavior start up at night, we would just say happily '"Puma, let's go to bed" and then lure her there with some treats and send her to her beloved crate. (She really does love her crate!)
We would leave her there with a nice dog safe chewie, tell her good night, cover her crate with a sheet so to keep the light out, and let her Z-Z-Z-Z-Z. When we checked on her she was always fast asleep, all curled up on her blankie looking like the sweet angel she is when she isn't beyond tired
Don't worry, this is normal, and your pup will grow out of it. Puma, now 8 months, takes her after dinner treats/chewies on "her couch" and then falls asleep until we wake her to go to her crate in our bedroom when we are all ready for bed. No more shark biting night monster! Yeah!!!!!!!