Calendar

An orderly arrangement of the division of time, adapted to the purposes of civil life, as years, months, weeks, and days; also, a register of the year with its divisions; an almanac.

A tabular statement of the dates of feasts, offices, saints' days, etc., esp. of those which are liable to change yearly according to the varying date of Easter.

An orderly list or enumeration of persons, things, or events; a schedule; as, a calendar of state papers; a calendar of bills presented in a legislative assembly; a calendar of causes arranged for trial in court; a calendar of a college or an academy.

To enter or write in a calendar; to register.

a system of timekeeping that defines the beginning and length and divisions of the year

a list or register of events (appointments or social events or court cases etc.); "I have you on my calendar for next Monday"