Cairo - Egypt's interim president Adly Mansour said in a speech to the nation, flanked
by high-ranking officials, that a referendum on a new draft constitution would be held next month.
It will be the first step towards elected rule in a country deeply polarised after president Mohamed Morsi was ousted by the military.
"I call upon you to vote in a referendum on the revised draft constitution on January 14 and 15," Mansour said.
The constitutional referendum is to be followed by parliamentary and presidential elections in mid-2014, according to a transition road map outlined by the new military-installed authorities.
The new constitution was drafted by a 50-member panel after the interim authorities suspended the previous version of the charter written under the Islamist Morsi.
Egypt's first democratically elected president was ousted by the army on 3 July after massive street protests against his turbulent year-long rule.
Islamists led by the now banned Muslim Brotherhood movement to which Morsi belongs had won all the elections organised in Egypt since the fall of Hosni Mubarak in 2011.
Morsi's removal caused deep divisions amid a sweeping and deadly government crackdown targeting his supporters, mostly Islamists, that has left more than 1 000 people dead and thousands more arrested.
Mansour praised the revised draft for its provisions on the "securing of human rights, freedoms and the balancing of powers".
"It is a good start on which to build the institutions of a democratic and modern state," he said.