The festival now is known as Sham Ennessim, and it has been nationally celebrated by all the Egyptians since ancient times, as it is considered a national festival in Modern Egypt as it was related to the agricultural background of the ancient Egyptians, originating from Shemu.
The Season of the Harvest was known to the Egyptians themselves as "Low Water" (Ancient Egyptian: Šmw), variously transliterated as Shemu or Shomu,[6] in reference to the state of the Nile before the beginning of its annual flood.
Because the precise timing of the flood varied, the months of "Low Water" no longer precisely reflected the state of the river but the season was usually the time for the collection of Egypt's grain harvest.
In the lunar calendar, each began on a dawn when the waning crescent moon was no longer visible.
In ancient Egypt, these months were usually recorded by their number within the season: I, II, III, and IV Šmw.