- Go to the calendar list view - Click on 'Create' - Tick 'All Day' - Set a start date The end date is set to the day before. This happens because in this case, the default duration is zero. opw-2236766 closes odoo/odoo#49682 X-original-commit: 0b6ae3ed4ff20898cd88b97a644190b20f11cf8f Signed-off-by: Nicolas Martinelli (nim) <nim@odoo.com>