I’ve managed to configure a custom date format d-M-Y (e.g. 23-Dec-2010) by setting date_formats in config_override.php. The dates display without any issues; however, with the new setting, the datepicker doesn’t work with fields with data type = date. Also, all the date values fail on save and produce “Invalid Value”, if entered manually.
I suspect that there is another setting that needs to be updated to make the validation and datepicker work with the custom date format.
Any thoughts would be appreciated.