Monday 17th April is Easter Monday, which is Bank holiday in the UK. In Egypt, the ancient festival of Sham El Nassim (literally meaning "smelling of the breeze") dates back to Pharonic times (about 2700 BC) although it is celebrated on the Coptic Easter Monday. It's not seen as a religious festival as it's a National Holiday for both Egyptian Christians and Muslims. Traditional activities include painting eggs, picnicking, and eating feseekh (fermented mullet).
Image shows sunrise over the Nile from the Philae Temple.