The 9th month of the year brings us Labor Day, and the start of the Fall season.
In the Georgian calendar, the calendar that most of the world uses, September is the ninth month of the year. However, it used to be the seventh month on the Roman calendar. It had 29 and 31 days but it later was changed to 30 days by Emperor Augustus. In Southern United States, it is the warmest months of the year and very cool nights for Northern states. It is the harvest time for crops and that is why Switzerland calls September the harvest month. In the Northern hemisphere, beginning of September leads to the beginning of meteorological autumn while it is the beginning of the meteorological spring in southern hemisphere.