Board Thread:News and Announcements/@comment-1173941-20131108024637

It seems that the Extra Edition episode will run exactly one day after it's Japan release, on CrunchyRoll and Daisuki.

Source: http://www.animenewsnetwork.com/news/2013-11-07/sword-art-online/extra-edition-to-stream-worldwide

More specifically, at around midnight of Jan 1, Japan time. I'm pretty sure this means right as January 1st ends in Japan. But yeah, around that time, the episode will be up for streaming on Crunchyroll...  