Hi,
Since the default date format of your machine is "dd/MM/yyyy", you would need to parse the BirthDay column’s FilterText from "MM/dd/yyyy" to "dd/MM/yyyy" and it would work as expected even on setting the 'NumberFormat’ of the column to "MM/dd/yyyy".
Please find the modified project which shows dates in "MM/dd/yyyy" format in the grid and executes without any error.
Thanks and Regards,
Pragati Kaushik