"Week" means any period of seven consecutive calendar days ending at midnight as the commissioner may by regulation prescribe.
[ 1945 c 35 s 37; Rem. Supp. 1945 s 9998-175. Prior: 1943 c 127 s 13; 1941 c 253 s 14; 1939 c 214 s 16; 1937 c 162 s 19.]