The interim government said in a statement Saturday that the evening curfew would begin at 9 p.m. (1900 GMT) rather than 7 p.m. (1700 GMT).
According to the statement, the new decision is a response to citizens' demands as unrest in the country wanes.
The statement says that an exception to the shorter hours will be in effect on Fridays, the first day of the weekend in Egypt and when protests typically take place.
The month long curfew had been 11 hours long daily. That cut into Cairo's bustling night life and the revenue of many businesses, hotels and restaurants.
Egypt has been experiencing unrelenting violence since July 3, when the army toppled President Mohamed Morsi, the first democratically elected Egyptian head of state, and suspended the constitution and dissolved the parliament.
It also appointed the head of the Supreme Constitutional Court, Adly Mahmoud Mansour, as the new interim president.
The interim government in Egypt has been facing international condemnation over the killing of protesters.
NTJ/SHI