noun

1. a system of determining the beginning, length, and divisions of a year and for arranging the year into days, weeks, and months
2. a table, chart, register, etc. that shows such an arrangement, usually for a single year
3. a list or schedule, as of pending court cases, bills coming before a legislature, planned social events, etc.

Etymology: ME calender < L kalendarium, account book < kalendae, calends

adjective

transitive verb