Prepositions of time (in, on. at)

My parent's aren't here....the moment.

I'm meeting my friend ...Tuesday.

She was born ... 2011.

I usually phone my friends...the weekend.

I usually brush my teeth ... the evening before I go to bed.

In France it often snows .... winter.

Policemen usually work ... night.

Our parents will be back .... August.

I usually have a party ... my birthday.

Mary's birthday is ... May.

Sara goes to the gym ... Saturdays.

My sister was in Lviv.... December.