Fill in the prepositions of time in the following sentences (AT, ON, IN).

1: He goes to bed at 9 o’clock. 2: Jane’s birthday is in May. 3: My mum wakes up at 7 o’clock in the morning. 4: His friends play football on Fridays. 5: I visit my granny on the weekends. 6: He went to Moscow in 2020.