h

12 hour clock with suppressed leading zero e.g. 9

hh

12 hour clock e.g. 09

H

24 hour clock with suppressed leading zero e.g. 9

HH

24 hour clock e.g. 21

m

Minutes with suppressed leading zero e.g. 4

mm

Minutes e.g. 04

mmm

Minutes blank when 0 and strips leading separator e.g. 4:00am becomes 4am

s

Seconds with suppressed leading zero e.g. 4

ss

Seconds e.g. 04

f

Milliseconds with suppressed leading zeros e.g. 4

ff

Milliseconds with suppressed leading zeros e.g. 04

fff

Milliseconds e.g. 004

u

Microseconds with suppressed leading zeros e.g. 4

uu

Microseconds with suppressed leading zeros e.g. 04

uuu

Microseconds e.g. 004

n

Nanoseconds with suppressed leading zeros e.g. 4

nn

Nanoseconds with suppressed leading zeros e.g. 04

nnn

Nanoseconds e.g. 004

t

A or P

tt

AM or PM

tl

a or p (lowercase)

ttl

am or pm (lowercase)