IN: used for the day parts (morning, afternoon), for the months (July, August, September), for the years (17, 2020), and for the centuries (XX, IV) ON: used for a specific day, month, or year (Monday the 13th) AT: used to give the specific place and time (Viva- 3:30PM) Example: • My birthday is in september • my grandmother likes to cook in the afternoon • On monday I'm going out to eat with my friend Ángel • I like going to the cinema on Saturday • The English class is at 10:00 p.m • My date with Jose is at 3:00 p.m IN: used for the day parts (morning, afternoon), for the months (July, August, September), for the years (17, 2020), and for the centuries (XX, IV)