I am always searching the internet for the DateTime formats, so i thought i will post it in my blog so that i don’t need to keep googling for it.

Specifier String Result Output
d dd-MM-yyyy 03-01-2009
D dd MMMM yyyy 03 January 2009
f dd MMMM yyyy HH:mm:ss 03 January 2009 17:31:14
g MM/dd/yyyy HH:mm 03-01-2009 17:31:14
m MMMM dd January 03
r ddd, dd MMM yyyy HH':'mm':'ss 'GMT' Sat, 03 Jan 2009 17:31:14 GMT
s yyyy'-'MM'-'dd'T'HH':'mm':'ss 2009-01-03T17:31:14
t HH:mm:ss 17:31:14
u yyyy'-'MM'-'dd HH':'mm':'ss'Z' 2009-01-03 17:31:14Z
U dd MMMM yyyy HH:mm:ss 03 January 2009 12:01:14
y MMMM, yyyy January, 2009
o yyyy'-'MM'-'dd'T'HH':'mm':'ss.fffffffK 2009-01-03T17:31:14.0303453+05:30 
DateTime todayDate = DateTime.Now;
string dateToStringInFormat = todayDate.ToString(formatSpecifier, 
System.Globalization.CultureInfo.CurrentCulture.DateTimeFormat)