About time  • The Ancient Babylonians were big fans of the number 360. It has tons of factors, and it's very nearly the number of days in a year. Nearly. Those Babylonians also loved nothing more than to divide up their 360s into bits. They divided their 360-day year into 12 months each of 30 days. They divided their 360-degree sky into the 12 signs of the zodiac. And they divided each of those 360 degrees into 60 minutes, each subdivided into 60 seconds - units still used today to describe latitude and longitude and to map the sky.