PARIS, France (CNN) -- The French are in for a significant cultural shift next week if the Senate approves a new law from President Nicolas Sarkozy to allow more shops to open on Sundays.



The law would permit shops, department stores, and shopping malls to open on Sundays in 20 zones.



What seems routine in much of the Western world has been fiercely resisted in France, where Sundays have officially been set aside as a day of rest for more than a century and where a 35-hour workweek remains the norm.



The new legislation, if approved by the Senate, would overturn a 1906 law that forbids Sunday trading in all but the largest cities. It is part of a raft of reforms Sarkozy has pushed for since becoming president.



While the change is significant, it is not as much as the government originally hoped because Sarkozy had to deal with opposition from both the left and the right.



Socialists filed thousands of amendments to the president's original version of the law. Leftists and unions said it would effectively introduce a seven-day workweek and allow bosses to force employees to work Sundays.



Members of the president's own ruling conservative party opposed the law despite assurances it would boost economic activity, saying it would instead deprive families and church groups of their dedicated day.



If approved by the Senate, the law would permit shops, department stores, and shopping malls to open on Sundays in 20 zones of what are called "exceptional commercial" centers near three of the country's largest cities: Paris, Marseilles, and Lille.



Additionally, 29 areas involving about 500 cities and towns would be added to the list of tourist areas, which already allow some economic activity on Sundays.



The new law will, among other things, straighten out a somewhat chaotic situation in which some stores managed to obtain exceptions from the old law and others didn't, and where some stores found it made more sense financially to accept fines for breaking the old law because the income from Sunday sales more than made up for the penalties.



The measure passed the National Assembly last Tuesday by a vote of 282 to 238. It will go the Senate for three days of debate next Tuesday, where it is almost certain to be approved.



Opinion polls in France show that slightly more than half the population want shops to have the freedom to open on Sundays, according to Time magazine.



CNN's Jim Bittermann contributed to this report.
Who doesn't want shops opened on Sunday? French Senate set to approve what new law? What year is the law that would be replaced if approved? Who put the original law into place? What law will it overturn? What is the new law? what did the 1906 law forbid?
Members of the president's own ruling conservative party a new law from President Nicolas Sarkozy to allow more shops to open on Sundays. 1906 President Nicolas Sarkozy 1906 would permit shops, department stores, and shopping malls to open on Sundays in 20 zones. Sunday trading in all but the largest cities.
question: Who doesn't want shops opened on Sunday?, answer: Members of the president's own ruling conservative party | question: French Senate set to approve what new law?, answer: a new law from President Nicolas Sarkozy to allow more shops to open on Sundays. | question: What year is the law that would be replaced if approved?, answer: 1906 | question: Who put the original law into place?, answer: President Nicolas Sarkozy | question: What law will it overturn?, answer: 1906 | question: What is the new law?, answer: would permit shops, department stores, and shopping malls to open on Sundays in 20 zones. | question: what did the 1906 law forbid?, answer: Sunday trading in all but the largest cities.