advent sunday(n = noun.time) - the first of the four Sundays during Advent;
is a kind of christian holy day
is a part of advent

advent, alb sunday, billy sunday, easter sunday, l'91tere sunday, low sunday, palm sunday, passion sunday, quadrigesima sunday, quinquagesima sunday, remembrance sunday, second advent, septuagesima sunday, sunday, sunday best, sunday clothes, sunday driver, sunday punch, sunday school, sunday school class, trinity sunday, william ashley sunday