Mr. Tines: We'd checked the onsen and beach episode boxes, but there was no Christmas episode/New Year's episode, not even of the odd unseasonal snow+presents type that RahXephon later felt obliged to include, to mark the change.
The combination of this date, and the frankly inexplicable UX of having a screen in EoE labelled just "2015" (rather than "Now") juxtaposed with one reading "Second Impact" (rather than "2001" which would be consistent) has had some interesting consequences.