Timeline
Progressive timelines for each server.

Release

Players versus Environment

Dungeons
Ragefire Chasm Ragefire Chasm
Wailing Caverns Wailing Caverns
Deadmines Deadmines
Shadowfang Keep Shadowfang Keep
Blackfathom Deeps Blackfathom Deeps
The Stockade The Stockade
Gnomeregan Gnomeregan
Razorfen Kraul Razorfen Kraul
The Scarlet Monastery


Razorfen Downs Razorfen Downs
Uldaman Uldaman
Zul'Farrak Zul'Farrak
Maraudon Maraudon
Temple of Atal'Hakkar Temple of Atal'Hakkar
Blackrock Depths Blackrock Depths
Lower Blackrock Spire Lower Blackrock Spire
Stratholme Stratholme
Scholomance Scholomance

Raids
Upper Blackrock Spire Upper Blackrock Spire
Onyxia's Lair Onyxia’s Lair
Molten Core Molten Core

Players versus Players

Others

General
Honor system pre 2.0

Battlegrounds
Warsong Gulch Warsong Gulch
Arathi Basin Arathi Basin

Until a player gets the [Talisman of Binding Shard], [Bindings of the Windseeker] will not be available on Garr and Geddon.

Azuregos

Kazzak

Dire Maul

Players versus Environment

Dungeons
Dire Maul Dire Maul

Events
The Maul

Alterac Valley, Patch 1.4 & Patch 1.5

Players versus Players

Battlegrounds
Alterac Valley Alterac Valley

Items

General
T1 sets have had their statistics, effects, and set bonuses updated.
Murloc Scale Belt and Breastplate recipes now are white items instead of green.

Raid itemization
Additional new raid items have been added to the treasure lists for Azuregos, Lord Kazzak, and bosses in Molten Core.

Gurubashi Arena event

Cloth Quartermasters

Mounts

There is now a regular event in Gurubashi Arena in Stranglethorn Vale. Every three hours starting at midnight, a pirate with too much treasure on his hands will drop a chest in the center of the arena.

Donations of cloth are now being accepted in the following locations: Darnassus, Stormwind, and Ironforge for the Alliance; Orgrimmar, Undercity, and Thunder Bluff for the Horde. Seek out an official Cloth Quartermaster for more information.

Level 60 mounts purchased at vendors now have a whole new look. The new mounts can be seen standing near the mount vendors.

Elemental invasions

Invasions by elementals at different locations on Kalimdor have reportedly been occurring sporadically every few days. Concerned adventurers should investigate Silithus, Un'Goro Crater, Azshara, and Winterspring to counter these incursions.

Blackwing Lair & Patch 1.6

Players versus Environment

Professions

Raid
Blackwing Lair Blackwing Lair

Items
[Bindings of the Windseeker] are now available on Garr and Geddon.

New recipes available from Argent Dawn, Timbermaw, Thorium Brotherhood reputation vendors and Lokhtos Darkbargainer in Blackrock Depths.

Players versus Players

Warsong Gulch
Warsong Gulch has new item rewards at the appropriate faction vendor near the entrances to the zone. These are available starting at Honored faction.

Items
Grand Marshal and High Warlord PvP Honor rewards have been updated with improved statistics.

Darkmoon Faire

A gathering of the exotic from around the world and beyond, Silas Darkmoon has brought together the Darkmoon Faire as a celebration of the wondrous and mysterious found in Azeroth. While the Faire spends most of their time in parts unknown, they do stop from time to time in Mulgore and Elwynn Forest. When the faire is on its way barkers will stop by Orgrimmar and Ironforge to announce its arrival.

Zul'Gurub & Patch 1.7

Players versus Environment

Raid
Zul'Gurub Zul'Gurub

General
The debuff limit has been increased to 16 (from 8).

Players versus Players

Arathi Basin
Arathi Basin has new item rewards at the appropriate faction vendor near the entrances to the zone. These are available starting at Honored faction.

Stranglethorn Fishing Extravaganza

The Stranglethorn Fishing Extravaganza is a grand new event set along the coasts of Stranglethorn Vale. Early on the appointed day, friendly neighborhood goblins will visit Ironforge and Orgrimmar to inform aspiring anglers of the grand tournament and give instructions. At the appropriate time, the shout will ring out across Stranglethorn to bait your hooks and cast your lines!

Dragons of Nightmare & Patch 1.8

Players versus Environment

Emeriss Emeriss
Lethon Lethon
Taerar Taerar
Ysondre Ysondre

Something is amiss in the Emerald Dream. Immense dragons with the shimmering emerald scales of the Green Dragonflight have been sighted guarding the portals at the Great Trees... but these once-noble creatures crawl with a new, strange menace, not the peace for which Ysera is known. Bring many allies should you dare to confront them; their powers are formidable and they will not hesitate to crush any who draw near.

Patch 1.9 - The Gates of Ahn'Qiraj

Players versus Environment

RAIDS
The Ruins of Ahn'Qiraj The Ruins of Ahn'Qiraj
The Temple of Ahn'Qiraj The Temple of Ahn'Qiraj

Patch 1.10

Items

Overall item upgrade.
T0.5 available.

Players versus Players

Battlegrounds
Increased reputation gain in Warsong Gulch and Arathi Basin.

Patch 1.11 - Scourge Invasion & Naxxramas

Players versus Environment

RAIDS
Naxxramas Naxxramas

QUESTS
Light's Hope Chapel has been revamped and is now a fully functional quest hub.

Players versus Players

ITEMS
An updated set of armor rewards have been added to vendors for Honor ranks 7, 8, and 10.
The armor rewards for Honor ranks 12 and 13 have been increased in level and stat point allocation.
New rank 14 weapons in order to give casters the same diversity of selection that melee currently enjoy!