%V - The ISO 8601:1988 week number of the current year as a decimal number, range 01 to 53, where week 1 is the first week that has at least 4 days in the current year, and with Monday as the first day of the week. (Use %G or %g for the year component that corresponds to the week number for the specified timestamp.)
%V - le numéro de semaine comme défini dans l 'ISO 8601:1988, sous forme décimale, de 01 à 53.