"Calendar quarter" means the period of three consecutive calendar months ending on March 31st, June 30th, September 30th, or December 31st.
[ 1945 c 35 § 6; Rem. Supp. 1945 § 9998-145. Prior: 1943 c 127 § 13; 1939 c 214 § 19; 1937 c 162 § 19.]