Question

Thirty days has September

Answer 1

Тридцать дней Сентября

Answer 2

Перевод : в сентябре есть 30-ый день.

Answer 3

Yes, that's correct! The phrase goes:

"Thirty days hath September, April, June, and November; All the rest have thirty-one, Excepting February alone, Which hath but twenty-eight, in fine, Till leap year gives it twenty-nine."

This mnemonic is often used to remember the number of days in each month of the year.