))
je l'avais lu mais j'ai pas cherché plus loin, maintenant c'est plus clair, stout 
squalyl (./25) :
pourquoi pas après 2099?
Et sinon merci pour l'ISO, comme ça c'est fixé
http://en.wikipedia.org/wiki/ISO_8601#Week_dates
http://en.wikipedia.org/wiki/ISO_8601#Week_dates :
Mutually equivalent definitions for week 01 are:
* the week with the year's first Thursday in it
* the week with 4 January in it
* the first week with the majority (four or more) of its days in the starting year
* the week starting with the Monday in the period 29 December - 4 January* If 1 January is on a Monday, Tuesday, Wednesday or Thursday, it is in week 01. If 1 January is on a Friday, Saturday or Sunday, it is in week 52 or 53 of the previous year.
: http://fr.wikipedia.org/wiki/ISO_8601#Num.C3.A9ro_de_semaine )
sans doute je bois trop de thé vert
