Facebook Lead Forms Sending DOB as March 3, 1958 or April 17, 1966 - How to convert this back to MM-DD-YYYY ?!?!

Facebook Lead Forms recently started sending DOB data over as March 3, 1953 instead of the usual 03-03-1953. FormatDate doesn’t seem to handle that well. What is the cleanest way to assign the appropriate month back to the corresponding month number?

I tried to use the parseDate function to then do a formatDate, but the Parse Date Function failed as well.

Attached a Photo where FormatDate is also throwing an error