Questions I want answered in HBP

[potioncat]

No: HPFGUIDX 132847

vmonte asked:
> 8.  Did Sirius's prank against Snape happen on the night of the 
> Hogwarts exams (Snape's penseive memory)?

Potioncat:
Remus and Sirius discuss the fact that it isn't a full moon that night. 
Sirius wants to go out and play. But, Remus isn't looking too good so 
there is a possibility that the moon will be full in a few days. In 
Harry's year, there was about a week of school after his last OWL exam. 
So there is a possibility that the Prank happens before the end of 
school.