Which country was the first to use 7 days-long week?
Ancient Greece
Ancient Egypt
Ancient India
Babylon
The seven-day week has deep historical origins in the astrology of Ancient Near East, being approximately a quarter of a lunation. It was (independently) adopted by the Persian Empire, in Judaism and in Hellenistic astrology, and (via Greek transmission) in Gupta India and Tang China.
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Answers by country
Ancient Greece
Ancient Egypt
Ancient India
Babylon
answers
Republic of Ireland
18
France
13
the United Kingdom
80
Greece
13
Poland
5883
Australia
18
Austria
36
Germany
142
Switzerland
13
Canada
12
India
29
the United States
80