Unfortunately, whenever you ask Access to use the AM/PM designation in the
format, it automatically reverts to the 12 hour clock. What you'll need to
do is use the Format function twice on your time:
Format(MyTime, "hh:nn:ss") & Format(MyTime, " am/pm")
(and that just goes to prove that your version of military time is
completely different than mine: the am/pm is unnecessary when using the 24
hour clock!)