School Years

Hogwarts-
First Year- 11
Second Year- 12
Third Year- 13
Fourth Year- 14
Fifth Year- 15
Sixth Year- 16
Seventh Year- 17

College-
First College Year (eighth year)- 18
Second College Year (Ninth year)- 19
Third College Year (Tenth Year)- 20
Fourth College Year (Eleventh Year)- 21
Fifth College Year (Twelfth Year)- 22