Prepositions of time

I'll see you ____ Sunday.

I've been invited to the birthday party ___ 20 May

I usually go to bed ______ 11pm.

The are usualy a lot of parties ____ New Year's Eve.

Ukraine became independent ____ 1991.

Schoolchildren have holidays _____ the summer.

It is dangerous for children to go out ____ night.

The train leaves ___ half past seven ____ the morning

We are going on a trip ______ the weekend.

I was born _____ August.

I usually get up early ____ weekdays.

We have a special meal ____ Christmas.