Converting MM/YY into MM/DD/YY for date column

Jason F

I had searched on here a couple times and tried some of what I found, couldn't get it to work.

I have the date imported in MM/YY format as a text column. I'd like to have a date column next to it, with MM/DD/YY, with the DD being the last day of the calendar month.

Am I aiming too high?