The term 'Month of Sundays' refers to a period of time that feels like it is lasting forever. The crossword solutions for this term are AGE (3 letters), AGES (4 letters), DOGSAGE (7 letters), BLUEMOON (8 letters), and DONKEYSYEARS (12 letters). AGE is a unit of time, usually referring to the length of a person's life. AGES is a plural form of AGE, referring to a long period of time. DOGSAGE is a humorous term for a long period of time, as dogs typically live much shorter lives than humans. BLUEMOON is a rare event that occurs when two full moons appear in the same month. Finally, DONKEYSYEARS is another humorous term for a long period of time, as donkeys typically live much longer than humans.