Where: Potter house
When: Late in the evening
Why: Because he can't spend the night hiding in the Ministry
Harry was upset, more than he had been for long time and he hadn't wanted to go home and tell his family the news in that state. He had locked himself up in his office and had felt like taking everything apart, which had resulted and several papers flying over his room which he later then had to sort out again. Neither had helped him to calm down, and at the end he had caved in and had felt the tears running down his cheeks, not managing to hold them back any longer.
Only as he managed to calm down a little again, Harry grabbed his robes and apparated home, hoping that no one else was still awake and that he simply would be able to sneak into bed and try to get some sleep.