Usually the new calendar's are promoted early on the VC challenge tab, was there an over site? I saw it in FB page feed how was even aware of it. (Are you ready for the upcoming three-day Calendar? This Calendar starts on January 10 at 10:00 am PST!)
Yeah that's usually the case, although it might not have been pushed live yet. Thanks for the heads up Matthew, I'll check with the developers. Update: It should show up in-game shortly.