The date se display en UTC without +1 for the hour of summer. For know the hour, verify on an site if your date of birth fall in an place who to an hour of summer and so delete the hour of summer if that be the case: https://www.lecalendrier.fr/changement-d-heure-1970, where we have the hours of summer and of winter since 1970, it suffice of the change to the end of the URL per your year of birth for know if that beed en hour of summer or of winter.