"Harry, you have one of the greatest hearts of any wizard who ever lived, and I do not believe your heart told you to do this."
-- Ginny Weasley (CC2.13)
Ginny returns to the room to find the kitchen in chaos (CC2.13).
Probably around the same time or a few days later than previous event, 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.
While the bare description of this duel sounds quite serious, it is actually quite a funny scene, with both Draco and Harry trying to one-up each other with successive spells:
"That really the best you got? ....Oh, this is too much fun…"
-- Draco Malfoy (CC2.13)
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 Jamie Parker in the role of Harry Potter, Poppy Miller as Ginny Weasley and Alex Price as Draco Malfoy: Harry Potter and the Cursed Child, Parts One and Two