The movie was initially supposed to be called 'Été 84' ('Summer of 84'). Robert Smith, the singer of The Cure, refused to grant François Ozon the permission to use his song The Cure: In Between Days (1985) because it was actually released a year later, in 1985. Ozon wrote back a letter to Robert Smith asking for a lower price for the rights and saying that he could change the name of his movie to 'Été 85', which was finally done.
At 49:51, The dress that David shows to Alex(is) is the dress that Lucia gave to Luc in Sommerkleid (1996), an early short film by François Ozon
Was selected for the 2020 Cannes Film Festival, which was canceled due to the COVID-19 pandemic.
Quotation by Paul Verlaine in 'Romances sans paroles': "Il faut, voyez vous, nous pardonner les choses."