How to set Date format in excel export using EPPlus?

Hi, I am using EPPlus to convert datatable to excel sheet.
Here, I try to set Datetime column's date value to certain format like "DD-MM-YYYY" using the below code.
ws.Column(i).Style.Numberformat.Format = "dd/MM/yyyy HH:mm";
if I set like this other columns which use numeric values are getting affected.
I want to set only a few date columns to the specific format without affecting other numeric columns.
How can I achieve this in EPPlus?