preposition of time ( at, in, on)

He goes to bed ___ midnight

 I usually read a book ___ the evening.

 We go to school ____ Mondays.

She comes home ___ six o’clock.

My birthday is ___ June 25th.

It's cold ___ the winter.

They go to.the cinema ____ Saturdays.

He gets up ___ seven o'clock.

We eat our dinner ___  the evening.

We go to the beach ___the summer.