Question

Is there a format value for DateTime.ToString(“”) that will specify the day of the year in three digits?

For example:

• Jan 1, 2012 would be 001
• Feb 1, 2012 would be 032
• Dec 31, 2012 would be 366 (leap year)
• Dec 31, 2011 would be 365

Answer 1

No, you can use DateTime.DayOfYear.ToString(“000”);

Your examples:

new DateTime(2012, 1, 1).DayOfYear.ToString("000");
new DateTime(2012, 2, 1).DayOfYear.ToString("000");
new DateTime(2012, 12, 31).DayOfYear.ToString("000");
new DateTime(2011, 12, 31).DayOfYear.ToString("000");