cal (1)              - displays a calendar and the date of Easter
calendar (1)         - reminder service
Date::Calc (3pm)     - Gregorian calendar date calculations
Date::Calendar (3pm) - Calendar objects for different holiday schemes
Date::Calendar::Profiles (3pm) - Some sample profiles for Date::Calendar and ...
Date::Calendar::Year (3pm) - Implements embedded "year" objects for Date::Cal...
ncal (1)             - displays a calendar and the date of Easter
zshcalsys (1)        - zsh calendar system