What is calendar ?

 

Calendars (also known as PIM - Personal Information Manager) allow you to store information about events such as meetings or reminders (e.g. to remind you of someone's birthday). Usually an alarm can be set to sound an alert.
Some devices offer the ability to synchronize the calendar with the one on your computer or your online calendar/task manager.

  

a system for fixing the beginning, length, and divisions of the civil year and arranging days and longer divisions of time (such as weeks and months) in a definite order

• a tabular register of days according to a system usually covering one year and referring the days of each month to the days of the week

• an orderly list: such as

            : a list of cases to be tried in court

           : a list of bills or other items reported out of committee for                                  consideration by a legislative assembly

          : a list or schedule of planned events or activities giving dates and                     details