In a statement today, the Cabinet said the curfew will be four hours, from 1 am to 5 am (local time), six days a week.
On Fridays, the Cabinet said the curfew will remain 10 hours, starting shortly after sunset.
Friday is the start of the weekend in Egypt and has been a day of major protests since the 2011 uprising. Now, supporters of ousted President Mohammed Morsi take to the streets in rallies Friday that often descend into clashes.