Mass. Gen. Laws ch. 138, § 33A: Sales of alcoholic beverages by on-premise licensees on Sundays and certain legal holidays; sales between 1:00 A.M. and 2:00 A.M.

Section 33A. The local licensing authority of any city or town which accepts this section may authorize licensees under section twelve to sell alcoholic beverages between the hours of one o'clock ante meridian and two o'clock ante meridian on Sundays, the last Monday in May and on Christmas day or on the day following when said day occurs on Sunday.