September · noun C or U /sepˈtem.bər/
September
A1 the ninth month of the year, after August and before October
Dictionary examples:
the 23rd of September/September 23(rd)
We're leaving for France on September ninth/the ninth of September.
Claudia started school last September/is starting school next September.
My mother's birthday is in September.
Learner example:
My course started [i]n September. (Skills for Life (Entry 1); A1; Polish)