What is September ?
September is (noun) the ninth month of the year, between August and Octo- ber September 3 The weather is usually good in September. Her birthday is in Sep- tember. Today is September 3rd. We al- ways try to take a short holiday in September. (NOTE: September 3rd or Sep- tember 3: say ‘September the third’ or ‘the third of September’ or in US English ‘Sep- tember third’.)
source: Easier English, Student Dictionary Upper Intermediate Level