What is "mesori"

Mesori ( Coptic: ), also known as Mesra, is the twelfth month of the Coptic calendar. It lies between August 7 and September 5 of the Gregorian calendar. The month of Mesori is also the fourth month of the Season of Shemu (Harvest) in Ancient Egypt, where the Egyptians harvest their crops throughout Egypt. The name of the month of Mesori comes from Mes-en-ra, an Ancient Egyptian word that means Birth of the Sun.