Here is one way to handle this.
Create a numeric column and set the format to be displayed to
yyyy-mm-dd
Then set the columns formula to
Date MDY(
Num( Substr( :Timestamp, 5, 2 ) ),
Num( Substr( :Timestamp, 7, 2 ) ),
Num( Substr( :Timestamp, 1, 4 ) )
)

Jim