Which feast day came first?

[CyrilSebastian]

                                 June 29th is the feast day of Saints Peter and Paul, Apostles.     
                                 The Feast of The Chair of Saint Peter the Apostle is February 22nd.   
                                 The Feast of the Conversion of Saint Paul the Apostle is January 25th.   
     
                                 In the history of the Catholic Church, which of these feast days was proclaimed first as a feast day?