Validate a Date field is set?

I have a date field, but it is depending on another checkbox field. If the checkbox is checked, then the date field is require. So the question is how do I validate the date field is set or not if the checkbox is checked? I try the Conditional Formatting rules, but I cannot configure a rule to check a date field is set or not.


You could set the date field as “Not Empty” and add conditional formatting to hide the date value when chechbox field value is not “Yes”. The date field will only show up when checkbox is checked and must be not empty.