LEGO 2015 Lego Advent Calendar – Day 18 December 18, 2015December 17, 2015 Eric Franks 1210 ViewsAdvent Calendar, Advent Calendar 2015, AT-AT, Hoth, LEGO, The Empire Strikes Back Day 18 of the Lego Advent calendar brings some trouble for our Rebel Soldier in the form of an AT-AT walker.