DateTime string.Format()

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)
z(time zone)

C# Example:

//Create DateTime value
DateTime currectDateTime = DateTime.Now;

Response.Write(String.Format("#1 {0:y yy yyy yyyy}", currectDateTime));