Major cities including Stormwind, Orgrimmar, and Dornogal host fireworks displays, beginning at 6pm and ending at 6am on your server time. Fireworks are set off on the hour every hour for the duration. Make sure to use your Shadescale or grab a Inky Black Potion beforehand to really make those fireworks pop in the sky!
/dance with a Winter Reveler to get the Celebrate Good Times! stat buff. Grab an Empty Festive Mug and click on a Festive Keg to get a Filled Festive Mug which gives you the Lightheaded slowfall buff to float around your festive New Year’s Eve bar-crawl with your guildies.
From all of us here at Wowhead, we wish you and your loved ones a very Happy New Year.