"I have an Aunt Padma?"
-- Albus Potter (CC2.9)
Albus Potter chases his father Harry, arguing with him about his friendship with Scorpius Malfoy. They meet his uncle, a much-changed Ron Weasley, now staid and conservative. A shocked Albus realises that he and Scorpius have altered past events by their use of the Time-Turner. Not only has he been sorted into Gryffindor rather than Slytherin, but Ron Weasley and Hermione Granger never married (CC2.9).
Under his father Harry’s direction, Albus has to ignore his friend Scorpius as they meet on the stairs. Both are devastated (CC2.9).
After the previous event, early September 2020
This event takes place during the Roseless timeline, as described in the essay "Albus Potter and the lesson in Quantum Mechanics" by Nick Moline.
The change in Ron Weasley is startling - although it seems that his son Panju is now the one who plays jokes in the family (CC2.9).
From the Web
Pottermore: Harry Potter and the Cursed Child
The theatre production opened in the West End of London at the Palace Theatre on 31 July 2016, with Jamie Parker in the role of Harry Potter, Sam Clemmett as Albus Potter, Paul Thornley as Ron Weasley and Anthony Boyle as Scorpius Malfoy: Harry Potter and the Cursed Child, Parts One and Two