What special days are in autumn?

Autumn features several special days, including Halloween on October 31st, celebrated with costumes and trick-or-treating, and Thanksgiving in the United States, observed on the fourth Thursday of November, focusing on gratitude and feasting. Additionally, the Autumn Equinox, occurring around September 22nd or 23rd, marks the official start of the season, when day and night are approximately equal in length. Other notable observances may include Harvest Festivals and various cultural celebrations that coincide with the fall season.