Date format of Document Folder exported into Excel

Hi everyone

I am currently trying to download a list (with name & modified) of all files in a Sharepoint Document Folder (including subfolders). As far as I know, I am able to achieve that by doing 'Export to Excel". However, when I open the downloaded Excel, I receive only a 15 digit-figure instead of a readable date format:

Is anyone able to help me with this?

Thanks a lot for your kind support and best regards

Sandro