DateField - allow typing of date without day of week

Sometimes it is handy to show the day of the week in a date field:

DateField startDate = new DateField("Start Date");
startDate.setDateFormat("EEE MM/dd/yyyy");

The problem comes when you try to type the date into the field instead of using the calendar popup. So typing “07/01/2019” won’t work because the DateField expects “Mon 07/01/2019”. Is there a way to tell the DateField to not require the day of the week for typing, just use it for display?

Vaadin 7.7.13 ( last public release ).