Template:Certification Table Entry/Sales/FrenchPeriod/doc
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This helper template calculates periods for French certifications for singles and videos, as stated in Syndicat National de l'Édition Phonographique#Singles
It returns:
| Before November 1, 1988 | Before March 1, 1991 | Before May 1, 2005 | Before July 1, 2009 | Before 1 March 2013 | Before 1 January 2016 | Before 27 April 2018 | 27 April 2018 and onward |
|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
Returns 0 if the data provided is not sufficient.