"So you're telling me that the whole of history rests on... Neville Longbottom?"
-- Ron Weasley (CC3.7)
Scorpius Malfoy goes with Severus Snape to meet Hermione Granger and Ron Weasley in a “Campaign Room“, which is hidden underneath the Whomping Willow. At first they are suspicious of him, but Snape insists that Scorpius is “safe” (CC3.6).
The changes caused by Albus Potter and Scorpius Malfoy’s time travels are discussed by Hermione, Ron and Snape. They make plans to reverse what Scorpius and Albus had done by using the Experimental Time-Turner to block what had been changed during the Triwizard Tournament First and Second Tasks. It seems that any sacrifice – even death – is worth Voldemort being defeated at the Battle of Hogwarts (CC3.7).
A short time after the previous event, around early October 2020
This event takes place during the Scorpion King timeline, as described in the essay "Albus Potter and the lesson in Quantum Mechanics" by Nick Moline.
Professor Snape, in spite of being on the same "side" as Ron and Hermione, hasn't lost his contempt for his former students:
"You were a terrible bore of a student…."
"I was an excellent student."
"You were moderate to average."
-- Severus Snape and Hermione Granger (CC3.6)
Hermione Granger and Ron Weasley are surprised to hear that they are married with children in the alternate world. Severus Snape accepts that he will be killed by Voldemort, although he rather pointedly says to Hermione about Ron that:
"….at least I’m not married to him" (CC3.7).
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 30 July 2016, with Anthony Boyle in the role of Scorpius Malfoy, Paul Bentall as Severus Snape, Noma Dumezweni as Hermione Granger and Paul Thornley as Ron Weasley: Harry Potter and the Cursed Child, Parts One and Two