In relativedelta, `day` means day of the month and `days` is for number of days. Today, the demo data failed because the computed `date_to` was before the `date_from`. closes odoo/odoo#68632 X-original-commit: 67cb39aa74ae60dd069bf552ed06c878ec643f9c Signed-off-by: Xavier Morel (xmo) <xmo@odoo.com> Signed-off-by: Christophe Monniez (moc) <moc@odoo.com>