She loves swimming ___ the summer.
IN
We are living ___ the 21 century.
IN
They celebrate their anniversary ___ March 8th.
ON
She's always busy ___ the weekends.
ON
She was born ___ December 15th.
ON
She usually goes to the gym ___ night.
AT
I usually watch movies ___ the evenings.
IN
We usually exchange presents ___ Christmas.
AT
They got married ___ a beautiful summer day.
ON
___ Halloween day, we like to dress up and have parties.
ON
We go to the beach ___ the summer.
IN
We're having a family picnic ___ Sunday.
ON
___ the 70's, men used to have middle-lengh hair.
IN
She usually wakes up ___ 7:00 AM.
AT
The restaurant is closed ___ Sundays.
ON
My vacation finally starts ___ Friday 15th!
ON
My classess will end ___ July 30th.
ON
What time do you get up ___ the morning?
IN