"Quite a surprise to see you, Draco. I thought you didn't believe in my dreams."
-- Harry Potter (CC2.3)
Harry Potter, Ginny Weasley, Ron Weasley, Hermione Granger and Draco Malfoy start arriving in Headteacher McGonagall’s office at Hogwarts via the Floo Network, making a mess of her carpet. They agree to search the Forbidden Forest for Albus and Scorpius (CC2.3).
Takes place early September 2020, probably during the second day after Albus and Scorpius escape from the Hogwarts Express and visit the St Oswald's Home
Ron Weasley somehow lands in the Hogwarts kitchen and has a meal before showing up in the Headteacher's office. One has the feeling that he hasn't really changed that much…. (CC2.3).
From the Web
The theatre production opened in the West End of London at the Palace Theatre on 31 July 2016: Harry Potter and the Cursed Child, Parts One and Two