May 2, 1998 - Voldemort is defeated; the surviving Death Eaters scatter
May 3 - May 15, 1998 - Mourning commences. Funerals are held for the fallen. Plans for rebuilding are made; clean-up begins in the Ministry
June - August - Aurors and Hit Wizards are kept busy with reports of DE sightings. All available bodies are recruited for various clean-up/rebuilding projects both inside the Ministry and inside Hogwarts
September - School begins; students banned from the school or who were in hiding for their 7th year return to finish their education. Construction continues. A spike is noticed in suspected werewolf activities
October 31 - A spell gone horribly wrong triggers the release of spirits
November 15 - present - the released spirits begin to settle on and haunt their host.
December 1 - Game Begins
December 11 - Hogsmeade Trip
December 15 - Ghosts begin to solidify
December 17 - Winter Break starts at Hogwarts
December 21 - Full Moon
December 22 - Ghosts present at start of game become living people
December 25 - Christmas
December 31 - New Year Gala
January 1, 1999 - Happy New Year!
January 10 - Students return from break
January 19 - Full Moon
January 31 - First construction "accident" at Hogwarts