WordWeb Online

1. A system of timekeeping that defines the beginning and length and divisions of the year
    
2. A list or register of events (appointments or social events or court cases etc)
   "I have you on my calendar for next Monday";
   - diary [Brit], datebook [N. Amer]
    
3. A tabular array of the days (usually for one year)

1. Enter into a calendar

Sounds like: calender

Derived forms: calendaring, calendared, calendars

Type of: arrangement, list, listing, organisation [Brit], organization, schedule, system, table, tabular array

Encyclopedia: Calendar, Reform of the