Sajith Premadasa will meet his party representatives, supporters and activists on November 21 at the party headquarters.
This will be his first public gathering after the defeat of the Presidential election.
A sizable proportion of party members and activists have requested Premeadasa to accept party leadership.
However, Premadasa is yet to make his position clear on the matter. Prime Minister Ranil Wickremesinghe is also yet to make a statement on whether he will step down from party leadership, making way for his successor.