Prepositions of time: in, on, at

I often sleep late ____ night.

I enjoy eating ice cream ____ the summer.

I love shopping ___ Christmas.

School lessons begin ____ September.

There is always a parade ___ October 28th (the national holiday).

I always get up early____ the morning.

We have English ___ Saturdays.

I sometimes volleyball training ___ half past 4.

I usually have a party ___ my birthday.

The Olympic Games in Athens were ___ 2004