Building on the solid foundation we already have in place for events, I've created this page, to tie together the various events, and am also adjusting (hopefully improving!) the individual events pages a little, chiefly Hallow's End. Most notably I've tried to expand the details of involved special features and the like; upsized the banners a little, since it was a little hard to see the details and they are the primary way of adding flavor and setting to the pages; and moved the seasonal ones over to Category:Seasonal events. This final change is in deference to the term used in official blogs, rather than 'Holiday'.
I've added event-themed videos where available, along with background from the official WoW site. There are also videos which are purely showing off the skins and mounts in question, which we could add since they might be of interest, or that might be overkill. They're already linked in the official links I've added, so this may be enough.
I also might have missed an event or two, so please do add any which I haven't.
I did find one other promotion: this for "Carnvial and Mardi Gras". It seems a bit vague, and doesn't match any lore setting, though (I believe), so I don't really see it as an event, not unless they repeat and expand it next year. We could probably make a similar Promotion page (or such), though, for things like this. -- Taohinton (talk) 02:30, 4 November 2015 (UTC)