String Format for DateTime using C#

Custom DateTime format specifiers:
y (year), M (month), d (day),
h (hour 12), H (hour 24), m (minute), s (second),
f (second fraction),
F (second fraction, trailing zeroes are trimmed),
t (P.M or A.M) and z (time zone)

// Code Sample for string date format
// create date time 2008-03-09 16:05:07.123
DateTime dt = new DateTime(2008, 3, 9, 16, 5, 7, 123);

// "8 08 008 2008" year
String.Format("{0:y yy yyy yyyy}", dt);

// "3 03 Mar March" month
String.Format("{0:M MM MMM MMMM}", dt);

// "9 09 Sun Sunday" day
String.Format("{0:d dd ddd dddd}", dt);

// "4 04 16 16" hour 12/24
String.Format("{0:h hh H HH}", dt);

// "5 05" minute
String.Format("{0:m mm}", dt);

// "7 07" second
String.Format("{0:s ss}", dt);

// "1 12 123 1230" sec.fraction
String.Format("{0:f ff fff ffff}", dt);

// "1 12 123 123" without zeroes
String.Format("{0:F FF FFF FFFF}", dt);

// "P PM" A.M. or P.M.
String.Format("{0:t tt}", dt);

// "-6 -06 -06:00" time zone
String.Format("{0:z zz zzz}", dt);