DateTime Format Day of Year

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

What is TT time format?

Terrestrial Time (TT) is a modern astronomical time standard defined by the International Astronomical Union, primarily for time-measurements of astronomical observations made from the surface of Earth.

What is T and Z in datetime?

The T is just a literal to separate the date from the time, and the Z means “zero hour offset” also known as “Zulu time” (UTC). If your strings always have a “Z” you can use: SimpleDateFormat format = new SimpleDateFormat( “yyyy-MM-dd'T'HH:mm:ss).

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");