Write at, on, in
1- 9 march
2- the afternoon
3- friday
4- 1999
5- christmas
6- christmas day
7- saturday night
8- the past
9- autumn
10- thursday
11- the weekend
12- dinnertime
13- the ninth of april
14- half past eight
15- monday evening
16- the end of the year
1 on
2 in
3 on
4 in
5 at
6 at
7 on
8 at
9 in
10 on
11 at
12 at
13 on
14 at
15 on
16 at