In my SharePoint 2013 I have 4 columns Start Date (date only), Start Time (Single line of text, max 5 characters), End Date (date only) and End Time (Single line of text, max 5 characters).
I want to come up with a List validation formula that will say: If End Date is equal to Start Date then End Time must be greater than Start Time and if End Date is greater than Start Date then End time can be any time.
I have the same rule in nintex form now I want to apply it in a List so when the users decide to use datasheet view the same rule will apply.