Unable to customize drop down date field on fillable pdf form

[defaultnketnpwdscr6]

How do I create a custom form field in adobe acrobat pro dc with a drop down date that includes the day of the week? I keep getting errors when I use the format: ddd mm/dd/yy.

Thanks

[ls_rbls]

You may need to employ a custom format script to display the desired date format in the dropdown menu list.

A dropdown menu object is not the same as a date field object. As such, you may need to do a little javascripting to get the desired date format result(s).

[George_Johnson]

What is the exact text of any error messages that you get?

[defaultnketnpwdscr6]

Attached are 2 screen grabs. One shows the customization I'm trying to achieve (Day of week as well as the date), and the other shows the error I get when I test the field. Unfortunately, I am not very savvy when it comes to javascript or programming in general. 

[JR Boulay]

Check the Default Value, in the Options tab. Be sure it not contain a white space or anything else.

[Nesa Nurani]

You can try change format, these two works:

ddd dd/mm/yy
mm/dd/yy ddd