Steps to reproduce: - Install "Field Service" module - Go to settings and activate "Recurring Tasks" - Go to Field Service -> All tasks and create new one - Set for Planned Date : 10/01/2021 14:00 -> 10/02/2021 14:30 - Check Recurrent and go to Recurrence tab - Select repeat every 1 weeks - Select Monday Issue: Wrong date for next occurrences (first occurrence is 09/06 instead of 10/04). Cause: Calculation based on today date. Solution: Calculate next occurrences based on planned_start_date if set. opw-2628777 closes odoo/odoo#76092 X-original-commit: 86060f9426eef6516db6dda7829ae17050f0fcc3 Related: odoo/enterprise#20659 Signed-off-by: LTU-Odoo <IT-Ideas@users.noreply.github.com> Signed-off-by: bon-odoo <nboulif@users.noreply.github.com>