Fifa says a presidential election will be held on 26 February 2016 to elect a successor to Sepp Blatter.
The announcement came as the executive committee of world football's governing body met in Zurich. It is the first time it has met since seven officials were arrested in May as part of an American investigation into alleged corruption and bribery.
Former UN Secretary General Kofi Annan should lead independent reforms to FIFA, campaign groups have said.
As FIFA's executive committee met to discuss reforms and a timetable for a new president to be elected, campaigners told a press conference in Zurich they had made contact with Mr Annan.
Jaimie Fuller, co-founder of New FIFA Now, said: "We are calling for Kofi Annan to come into this mess and take control of the reform process."
Tim Noonan, of international trade union body ITUC, added: "We have spoken to Kofi Annan...he has indicated that he (would be) open to receiving a proposal, the initial contact has been made."
Michel Platini has formally announced that he intends to stand for the Fifa presidency when Sepp Blatter vacates the position
The comedian best known as Lee Nelson is to be charged with trespass by Swiss police.
FIFA says a presidential election will be held in February 2016 to elect a successor to Sepp Blatter - here's the men in line to replace him