system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Where did our time keeping system come from? How did it become so popular?

From which Civilization does the idea of having 24 hours a day, and 60 minutes in an hour come from? How did it become the global standard for time keeping? What were some alternatives that were used before?
gpt
The Egyptians divided the day in 24 parts, allegedly because they used a numerical system that used 12 as a base (Egyptians used to count joints on each finger with their thumb, so they could count to twelve using one hand). Also, they used a set of 36 stars, 12 which were only visible in complete darkness.

Greek astronomers used different influences from different cultures. Whereas the 24-hours division of the day came from Egyptians, the Greeks used techniques from the Babylonians, who had a sexagesimal system (a numerical system with the base of 60). 

Hipparchus later divided the map of the world in sections of 360 degrees. Ptolemy (Claudius) would later expand on his work and divided each degree in 60 parts (partes minutae primae, or first minute) and each of these parts in 60 more parts (partes minutae secondae), or second minute, or second. It was not until the 16th century that this system was introduced in actual time-keeping.