DAY 1 ENDS
Twilight was settling on Hogwarts. The time of day, not the god-awful book. And in the Room of Requirement, the DA were practicing.
Ginny raised her wand. "RECUCTO!"
The dummy disintegrated, each piece burning for a second before vanishing.
Neville smiled, a wicked smile. "REDUCTO!"
But his dummy did not explode. There was a flash of light, a cloud of smoke, and when it all cleared, Neville was nowhere to be seen.
"Neville? NEVILLE!"

Gimliggamer was lynched. He was Neville, a member of Dumbledore's Army. (A Mason)

NIGHT 1 BEGINS
And ends in 48 hours approx.