When the sun goes down and it gets darker, our melatonin level rises, we feel tired, and it's the signal for the brain it's time to sleep. "In the summer, the days do get longer, so we are being stimulated by sunlight later and later, and depending on where you live it might be very late," but most of the time we always find it hard to sleep doing this time
I can't sleep in midnight for a long time but daytime is very hot but I am sleeping .