Getting the Week number based on the week of the month

Is there a formula that can express =A2(WEEK 1) as the number of the week?


For example, in Cell A2, I have the word September. I want B2:B6 to automatically input the week number (the first week of September is week # 36) based on the month and week (week 1 = 36, week 2 = 37, week 3 = 38, week 4 = 39, and week 5 = 40). If I were to change A2 to October, I want the cells in B2:B6 to automatically update (Week 1 = 41, week 2 = 42, week 3 = 43, ETC.).

Look at WEEKNUM function