In spite of many fatwas to prohibit Muslims from celebrating pharaonic and Christian feasts, millions of muslims have celebrated Sham El Nessim in public gardens and by the River Nile.
It's worth mentioning that Sham El Nessim is an Egyptian national holiday marking the beginning of spring. It always falls on the day after the Eastern Christian Easter (following the custom of the largest Christian denomination in the country, the Coptic Orthodox Church.