Intercalary month (Egypt)

Pi Kogi Enavot (Coptic: Ⲡⲓⲕⲟⲩϫⲓ 'ⲛ'ⲁⲃⲟⲧ; literally the little month), also known as El Nasii, is the thirteenth and last month of the Coptic calendar. It lasts between September 6 and September 10 of the Gregorian calendar. That month is also in the Season of Shemu (Harvest) in Ancient Egypt, where the Egyptians harvest their crops throughout the land. Of the Ancient or Emergence, Harvest, and Inundation calendar, Pi Kogi Enavot lies within the first part of July at the end of the year, before the new year or Emergence year starts a few days later in the second part of July.

Coptic Synaxarium of the month of Pi Kogi Enavot

Coptic	Julian	Gregorian	Commemorations
Nasii 1	August 24	September 6	Departure of St. Eutychus. Martyrdom of St. Pishay (Abshai), the Antiochian.
2	25	7	Departure of St. Titus, the Apostle. Martyrdom of St. Isaiah, brother of Apa Hor
3	26	8	Commemoration of Raphael, the Archangel. Martyrdom of St. Andrianus. Departure of St. John XIV, the 96th Pope of Alexandria.
4	27	9	Departure of St. Liberius, Bishop of Rome. Departure of St. Poimen, the Hermit. St. Inianamon
5	28	10	Departure of St. James, Bishop of Cairo. Departure of Amos, the Prophet. Departure of St. Parsoma, the "Naked". Departure of St. John XV, the 99th Pope of Alexandria.
6	29	11	Thanksgiving to God the Exalted.

References

Synaxarium of the month of Nasie