"This September 30, the pope will hold the consistory of the saints.
On that occasion he will announce the dates of the canonizations," said Cardinal Angelo Amato, prefect of the Congregation for the Causes of the Saints, when asked when the polish pope would be made a saint.
The canonization is expected to take place before the end of the year, and the feast of the Immaculate Conception, December 8, has been floated as likely.
Polish prelates have pushed for October, which would mark 35 years since John Paul's election, something Vatican officials have suggested would be too difficult to organize in such short time.
Early last month, Pope Francis made the last key move to make saints of his two most popular recent predecessors, whose impact on the Catholic Church and charismatic leadership many think the new pontiff will end up rivaling. By signing a decree needed for both of their canonisations, he confirmed recent speculation that they would take place at the same time.