If we tried to look back to when the first calendars were made we would find that they have been in use for over 2,000 years.
This suggests that thousands of years ago people had already discovered patterns of time and seasons. It affected when they planted, harvested, hunted, and performed many other of the tasks necessary to their very survival.
However, the calendar we know and use today, the Gregorian calendar, first came into use around 1582. Our use of this calendar is not so very different from the ones used thousands of years ago. We use them to keep track of social events as well as appointments.
But the important role calendar play in our daily work is crucial for our businesses.