Paitishahema

The third festival of Paitishahema commemorates earth’s creation and the fall harvest. It takes place on the 176th to 180th days (September 12 to 16).

Zoroastrians observe six seasonal festivals (Gahambar) that celebrate the sanctity of God’s universal creations. Each Gahambar lasts five days and honors the five material creations: earth, water, plants, animals and humans. Believers spend the first four days reciting scriptures and come together on the last day for a feast.

Sourced from https://theguibordcenter.org/zoroastrian-holy-days-and-observances/