**September has 30 days.** Here's a breakdown of days in September: - Total days: **30** - Weekdays: **Monday to Sunday** (repeating 4-5 times depending on the starting day of the month) - Notable dates (examples): - September 1 (start of meteorological autumn in some regions) - September 23 (autumnal equinox in the Northern Hemisphere) *Note: The exact dates of holidays/events may vary by country or calendar year.*