Template:Certification Table Entry/Sales/FrenchPeriod/doc

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This helper template calculates periods for French certifications, as stated in Syndicat National de l'Édition Phonographique#Certification awards (Timeline)

It returns:

Before November 1, 1988 Before March 1, 1991 Before May 1, 2005 Before July 1, 2009 After July 1, 2009
1 2 3 4 5

Returns 0 if the data provided is not sufficient.