Lesson Six: We use ordinal numbers to talk about the order of things. For example: My first car was white, but my second car was red. We also use ordinal numbers to talk about dates. For example: “Today is June tenth,” said the teacher. Ordinal Numbers for Dates first (1st) eleventh (11th) second (2nd) twelfth (12th) third (3rd) thirteenth (13th) fourth (4th) fourteenth (14th) fifth (5th) fifteenth (15th) sixth (6th) sixteenth (16th) seventh (7th) seventeenth (17th) eighth (8th) eighteenth (18th) ninth (9th) nineteenth (19th) tenth (10th) twentieth (20th)