Using the Date-Time element
The Date-Time element allows you to add the date and time the form began filling out.
Select Date-Time under Element Properties on the left side of the screen. You will see a new element pop up on your device view.
On the right side of the screen under Element Properties, enter the name of your element as well as a description if necessary. To make information required to submit the form, scroll down and select Required under Element Properties.
Click the save icon at the top right corner of the page.
How to enter Date -Time automatically
Select Save then Close to exit.
Place the variable you selected from Step 2 into the Dynamic Value box.