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The concept of a week with seven days has been in existence for thousands of years and has its roots in both ancient civilizations and religious beliefs.
One influential factor was the celestial bodies. The ancient Babylonians, who were skilled astronomers, associated each day of the week with one of the seven celestial objects visible to the naked eye: Sun, Moon, Mars, Mercury, Jupiter, Venus, and Saturn.
Later, the seven-day week was adopted by the Romans, who named each day after a different celestial body. This system spread throughout Europe and became widely accepted.
Religious beliefs further solidified the seven-day week. In Judaism, the Bible describes God creating the world in six days and resting on the seventh, setting an example of a six-day workweek followed by a day of rest. Christianity, with its Sabbath day of rest, also contributed to the continuation of the seven-day cycle.
While the exact origins and reasons for a seven-day week remain somewhat uncertain, it is a cultural convention that has persisted over centuries and continues to be widely used today.