The "d" format specifier represents a custom date and time format string.
The format string is defined by culture's DateTimeFormatInfo.ShortDatePattern property.
The custom format string is −
MM/dd/yyyy
using System; using System.Globalization; class Demo { static void Main() { DateTime myDate = new DateTime(2018,9, 09); Console.WriteLine(myDate.ToString("d", DateTimeFormatInfo.InvariantInfo)); Console.WriteLine(myDate.ToString("d", CultureInfo.CreateSpecificCulture("en-US"))); } }
09/09/2018 9/9/2018