Officials said the formal election of new Prime Minister by members of the National Assembly will be held on June 5.
The first session of the new National Assembly will be convened on June 1. Soon after the House convenes, the newly elected members will take oath.
Earlier, the PML-N formally nominated Sharif, 63, for the office of Prime Minister after the party attained a majority in the 342-member National Assembly or lower house of parliament.
The final approval for Sharif's nomination will be made during a meeting of the PML-N's parliamentary committee before the start of the first session of the new National Assembly.
Sharif had earlier served as premier during 1990-1993 and 1997-1999.
Nomination papers for the posts of Speaker and Deputy Speaker of the National Assembly will be submitted on June 2 and elections will be held the next day. Nomination papers for the post of Prime Minister will be submitted on June 4 and the election will be held the following day.