I live in Quebec, where we speak french, and I never heard that. Where is this used?
No, the French do not count 8 days as a week. There is a word "huitaine", which is used like "dozen" for counting things grouped into eight items. It can be used to mean, "about a week", because on the eighth day, a week has passed. It's not used very often in this sense. And, huitaine is not a synonym for week.
The Beatles wrote a song called, "Eight Days a Week". And last I checked, they're all British.
· 9 years ago