This date marks the club's official birth and the end of a process that had begun a few months previously...
On 27th May 1970, at Paris FC's general assembly, which had been mandated by the French Football Federation in order to create a major football club in Paris, the principle of a merger with Stade Saint-Germanois – a club that was due to start playing in the French second tier – was unanimously adopted.
Just over a week later, by 85 votes to five with one absention, SSG itself agreed to merge with Paris FC, to split its football team from the rest of the club and to approve the new name of Paris Saint-Germain FC.
On 26th June that year, at the new club's EGM, the board of administrators ratified the creation of Paris Saint-Germain and of 27 geographic branches, which brought together 400 to 600 associates.
Three new administrators from Saint-Germain-en-Laye – including Jean Chastang, the town's mayor at the time – then came on board, with these administrators delegating some of their powers to an executive commitee.
Meanwhile, Pierre-Étienne Guyot was named as Paris Saint-Germain president and would be assisted by two vice-presidents: Guy Crescent and Henri Patelle.
On 8th August, Paris FC's senior executives asked for permission to modify the club's name to "Paris Saint-Germain Football Club" by sending a letter to the Paris Police Prefecture, which was received on 11th August.
This name change was accepted the next day and was then made official by the Official Journal of the French Republic on 27th August, as required by law.
As a result, the club turns 55 today, after an emotional year in which it claimed a domestic treble as well as the best possible gift that it could have wished for: its first-ever UEFA Champions League trophy.
Happy birthday, Paris Saint-Germain!