I think I have found an issue if date format are set like this :
agenda.manager_date_format : d M Y agenda.manager_date_format_long : l d M Y
The result is you can’t select a future date with the selector : the date stay back to the current day.
If I’m unclear, I can make a screencast to view the behavior.
Maybe it’s due to the space, because I have found a workaround by replacing the space with a slash :
agenda.manager_date_format : d/m/Y agenda.manager_date_format_long : l d/m/Y