Sham Ennessim Celebrations in Sudan in Khartoum/Omdurman
The Sudanese observance of Sham El Nessim, an ancient Egyptian-origin spring festival celebrated the Monday after Coptic Easter with outdoor picnics along the Nile in Khartoum and Omdurman, adopted through centuries of Nile Valley cultural exchange.
Sham El Nessim's roots reach back roughly four and a half thousand years to the ancient Egyptian Shemu festival, which marked the start of the harvest season along the Nile and was itself tied to the spring equinox.