ArenaNet has released the first information about the first monthly update. Called "Flame & Frost", the event is set to go live on January 28th and will feature guesting, an improved achievement system and laurels, upgrades and new items in the Gem Store.
We’re adding a new rotation of daily achievements to add variety and encourage you to explore the open world. You’ll get different achievements every day of the week and a new achievement tracker in the UI to make it easier to track your progress.
Check out the teaser site on the main Guild Wars 2 page.