Hi Marcello,
Thank you for using Syncfusion products.
We are unable to reproduce the issue. Please look at the sample, which stores the date and time in the required (dd/mm/yyyy) format,in pdf light table.
Sample:
http://files.syncfusion.com/samples/PDF.Web/PDF_Table.zipPlease try this and let us know if you have any questions.
Regards,
Pravin Joshua D