I take it by your previous postings this is regarding a initial Type Rating.
So you have sims in the middle of the night......that's life, get over it.
I have had sims at stupid times of the day and night, the sim operates 24 hours a day, you take what you can get.
How are you going to deal with a flight that leaves at 10pm and returns at 6 am next day, flying all through the night!
I have done my fair share of night flights and I fly the Boeing 737.
If you think you will only work 9 to 5 you are in for a big shock.