"2 days" - excludes the day on which the time period begins and any intermediate Saturday, Sunday, or legal holiday;
"5 days" - excludes the day on which the time period begins and any intermediate Saturday, Sunday, or legal holiday;
"7 days" - excludes the day on which the time period begins. It includes Saturdays, Sundays, or legal holidays unless the 7th day falls on a Saturday, Sunday, or legal holiday; in that case, the period ends on the next day which is not a Saturday, Sunday, or legal holiday.
10-146 C.M.R. ch. 10, § 1