This is the timeline when Ron left Harry and Hermione alone in a fit of rage directed at Harry (he also insulted Harry's family). Now this is after Harry and hermione came back from Godric's Hollow, and Harry broke his wand. His faithful Phoenix core wand, which has survived so much, had finally fallen, due to the Blasting curse Hermione casted at Nagini, but it broke his wand instead. And he's very upset, even though Hermione apologised profusely...