End Google Ads 201810 - BS.net 01 --> Good afternoon.

We want a user to enter a date as 08/07/2009, but if someone enters 08/07/09 we want to format it correctly, but any other dates like 08/07 will be rejected. I know InfoPath automatically changes 09 to 2009 depending on the format of the field. What makes it additionally challenging, is if someone enters 08/07/20 (deletes the 09 in error), we wouldn't want it to format 08/07/2020.

Any suggestions? Thank you, WHEELS