Noon is neither AM nor PM
As Lionga says <i>&#x27;just use a sensible time system with 0 to 24 hours for a day&#x27;</i>.<p>This is the <i>American problem</i> again [or more correctly the problem of some Anglophone countries].  It&#x27;s time they got over this AM&#x2F;PM stuff and followed the less confusing nomenclature the rest of the world uses.<p><i>(It&#x27;s the second time this matter of &#x27;antiquated units&#x27; has come up this week in HN, see <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=24777268&amp;p=2" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=24777268&amp;p=2</a> - starting with my comments then onward [currently they&#x27;re on page 2]</i>