Phase 1
Vanilla:
11/23/2004- Release
12/18/2004- Maraudon (week 4)
1/20/2005- 1st lucifron kill- (week 9)
1/30/2005- 1st Onyxia Kill- (week 10)
2/10/2005- 1st Majordomo Kill- ( week 12)
4/25/2005- 1st Ragnaros Kill- (week 22)
Classic:
8/27/2019- Release
Maraudon- Release
1st lucifron kill- (week 1)
1st Onyxia kill- (week 1)
1st Majordomo kill- (week 1)
1st Ragnaros kill- (week 1)
Phase 1.5- 2
Vanilla:
3/7/2005- Dire Maul, Azuregos, Lord Kazzak (week 15)
4/08/2005- PVP Honor system ( week 20)
6/07/2005- Warsong Gulch and Alterac Valley added (week 28)
8/22/2006- Cross-Realm Battlegrounds (week 91)
Classic:
Dire Maul- (week 7)
Azuregos, Lord Kazzak- (week 11)
PVP Honor system- (week 11)
Warsong Gulch and Alterac Valley (week 15)
Cross-Realm Battlegrounds (week 15)
Phase 3
Vanilla:
7/12/2005- BWL and Darkmoon Faire added (week 33)
9/13/2005- Arathi Basin added (week 42)
Classic:
Blackwing Lair (week 24)
Darkmoon Faire (week 24)
Arathi Basin (week 28)
Phase 4
Vanilla:
9/13/2005- ZG and STV fishing tourney added (week 42)
10/10/2005- Dragons of nightmare and Abyssal High council added (week 46)
Classic:
Zul’Gurub release (week 33)
STV fishing tourney (week 33)
Dragons of nightmare (week 33)
Abyssal High council (week 33)
Phase 5
Vanilla:
1/03/2006- AQ Release (week 58)
1/23/2006- First server opens gates (week 60)
Classic:
AQ release (week 48)
AQ gate opens (???)
Still to come:
Vanilla:
6/20/2006- Naxx Added (week 82)
9/11/2006- TBC Announced (week 93)
1/09/2007- TBC Pre-Patch (week 111)
1/16/2007- TBC Launch (week 112)