The Twelve-Month Calendar Was Invented In Egypt

You probably don’t know this, but the calendar that we use today was invented by ancient Egyptians. Yes, ladies and gentlemen, the first calendar known to humankind was invented in Egypt. In fact, it is the year 6264 in the Egyptian calendar.
The ancient Egyptians used the 12-month calendar like we do today. However, each month was always 30 days which meant that their years were only 360 days in total causing the years to fall out of sync with the seasons. So to make up for the lost time, they held a 5-day festival at the end of each year.
Related Facts

Did you Know? The tem 'Housewarming Party' comes from a literal tradition that used to occur before electricity.

Hitler's nephew published an essay criticizing the dictator, then traveled to the United States and joined the Navy to oppose his uncle.