You are using "Populate text field" which is probably why it is passing as Text...is it not supposed to be text, or is it in the wrong format?
If it's not supposed to be text, try changing to the appropriate comment such as "Set drop down list".
If it is supposed to be text, and it is simply in the wrong format, use Convert Date to Text and populate the text field with the result. When using Convert Date to Text, ensure you use MM for month as mm stand for minutes.
Best of Luck!