UPDATE: it appears the deal is not for EOS M mount. Sorry.
Amazon Germany has the Walimex 12mm f/2 lens
for Canon EOS M mount as Blitzangebot (Gold Box deal). The deal will go online at 18:30 Berlin time. Note that you can order the lens also from other EU countries. Be sure to choose the right mount type when placing your order. Black and silver versions available. Amazon Prime members have access to the deal at 18:00.