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00:00But why is there 24 hours in a day?
00:03To know the origin of the 24-hour day,
00:06you have to go back and go back to 3000 BC.
00:10It was indeed the Babylonians who constituted a calendar of 360 days.
00:15It was also them who decreed that the days would be 24 hours,
00:19i.e. 12 parts for the night and 12 others for the day,
00:22and that each hour would be made up of 60 minutes.
00:25This system will then be taken over by the Greeks, then by the Romans.
00:29If inaccuracies remain,
00:31the hours remain mostly based on human activity.
00:34And to know the time that it is throughout the day,
00:37humans use the solar dial,
00:39a formidable system for its time.