Doing Date Subtraction in Excel

Yes

Let’s assume first digit is the month and the values are within the data table similar to excel
grafik

otherwise we use ParseExact to get more control (e.g. first digit is day)
grafik

And for checking what is inside the data table after read range / adopting the parsing format we can do:
:ambulance: :sos: [FirstAid] Datatable: Debug & Analysis invalid DateTime Strings / String to DateTime Parsing Issues - News / Tutorials - UiPath Community Forum