How can I convert date to string format using calculation logic?

https://www.jotform.com/answers/754758-How-to-Show-the-Day-of-the-Week-on-Date-Field

I am trying to set this conditional logic for our Birthday Reservations form. Are you able to help? Its not working. This is the result I get. See screen shot below. ©dateString©17537

I have cloned your form and apply the same calculation logic. It works fine for me.

Please check my clone form here: https://form.jotform.com/80044685070958

Check out this screenshot:

You can clone my form if you want to.

https://www.jotform.com/help/42-How-to-Clone-an-Existing-Form-from-a-URL

If you have any further query, please let us know.