Date Formatting in C#

Specifier	Description	Output
d	Short Date	08/04/2007
D	Long Date	08 April 2007
t	Short Time	21:08
T	Long Time	21:08:59
f	Full date and time	08 April 2007 21:08
F	Full date and time (long)	08 April 2007 21:08:59
g	Default date and time	08/04/2007 21:08
G	Default date and time (long)	08/04/2007 21:08:59
M	Day / Month	08 April
r	RFC1123 date	Sun, 08 Apr 2007 21:08:59 GMT
s	Sortable date/time	2007-04-08T21:08:59
u	Universal time, local timezone	2007-04-08 21:08:59Z
Y	Month / Year	April 2007
dd	Day	08
ddd	Short Day Name	Sun
dddd	Full Day Name	Sunday
hh	2 digit hour	09
HH	2 digit hour (24 hour)	21
mm	2 digit minute	08
MM	Month	04
MMM	Short Month name	Apr
MMMM	Month name	April
ss	seconds	59
tt	AM/PM	PM
yy	2 digit year	07
yyyy	4 digit year	2007
:	seperator, e.g. {0:hh:mm:ss}	09:08:59
/	seperator, e.g. {0:dd/MM/yyyy}	08/04/2007

Source : http://www.mikesdotnetting.com/Article/23/Date-Formatting-in-CSharp