Convert string to DateTime not working

Hi @l.sestafes
Have a look here for some steps when doing an analysis:

:ambulance: :sos: [FirstAid] Datatable: Debug & Analysis invalid DateTime Strings / String to DateTime Parsing Issues - News / Tutorials - UiPath Community Forum

As mentioned the values within the datatable are not mandatory the same as we do see in the excel file. But as described you can analyise and check.

In case of your date date looks like a number then check following:
grafik