use strict;
use POSIX qw(strftime);

print strftime qq{
a: Day of Week    (short, text) %a
A: Day of Week     (long, text) %A
b: Monthname      (short, text) %b
B: Monthname       (long, text) %B
c: Full datetime (number, long) %c
d: Day                 (number) %d
H: Hour (24 hour)      (number) %H
I: Hour (12 hour)      (number) %I
j: Day of year         (number) %j
m: Month               (number) %m
M: Minutes             (number) %M
p: am/pm/empty           (text) %p 
S: Seconds             (number) %S
U: Week of Year        (number) %U
w: Day of week         (number) %w
W: Week of Year        (number) %W
x: date                (number) %x
X: time                (number) %X
y: year         (short, number) %y
Y: year          (long, number) %Y
Z: timezone              (text) %Z
},
localtime;
[download]