Fireworks???

Okay today for those who live in Giza and Cairo ,there were fireworks at about 07:30 -08 pm .can anyone tell me why there is joy in town ? for what occasion ? I saw the calendar and I know the glorious 1952 revolution anniversary is coming after exactly 5 days ,so do they now celebrate it in advance ????
I watched the new at 9 pm on ch.1 hoping to get some clues ,but today nothing happen except a graduation of military school 'today was the Air Forces'
I love Fireworks but why ?
This is good question I guess :)