September 2026 Calendar With Holidays Usa Spectacular Breathtaking Splendid. The september equinox usually falls on september 22 or 23 and is the start of astronomical fall in the northern hemisphere. September corresponds partly to the fructidor and partly to the vendémiaire of the first french republic.

As september arrives, monsoons fade, paving the way for the forthcoming season. The september equinox usually falls on september 22 or 23 and is the start of astronomical fall in the northern hemisphere. September was called the harvest month in charlemagne's calendar.