AwakeandAlive on 29 January 2014
The german retailer "buecher.de" only use "31th december" for unknown dates. I can not remember the game anymore , but they leaked the release date of another game, but nobody cared, because it is germany. ^^
4th April is a friday btw.
http://www.buecher.de/shop/wii-u/mario-kart-8-wii-u/-/products_products/detail/prod_id/38596093/
