I have a DetailForm where it draws data from a Gallery (standard auto-build). One value is a date, but shown as a number (e.g. 39109). I am trying to get it to appear as a normal date (27/01/2007). However, everything I do either displays nothing or displays the wrong date (01/09/3910).
The item is in a card:

The card has the following properties:

The Value has the properties:

The "Default" was initially "Parent.Default" with the resultant value being 39109.
I attempted to change the "Default" to "DateValue(Parent.Default,"en-GB")", but I believe "Parent.Default" is formatted as a number, so had an error. So, I changed it to DateValue(Text(Parent.Default),"en-GB") and the result was 01/09/3910.
What am I doing wrong here? How do I get it to show "27/01/2007"?
Thank you for your assistance.