Form Validation, if is not blank do validation

Question

Hello i have a list with 2 date columns, [Date1] , [Date2],

How do i excecute the next validation on te list validation, only if that fields are not empty:

=[Date2]>[Date1]]

i want the users can let empty that fields and only validate if the dates are entered. Thanks, im on sharepoint online

Answer 1

This will do:

=OR(ISBLANK([Date2]),[Date2]>[Date1])

Basically, save only if 1) Date2 is empty or Date2 value is greater than Date1