AM and PM are rather old fashioned. I prefer 00:00 and 12:00 simple, and unambiguous.
Sent from my iPhone
> On 21 Dec 2014, at 23:16, Orion <[log in to unmask]> wrote:
> What did I tell you about bureaucrats?
> The thirtieth edition of the U.S. Government Style Manual (2008) sections
> 9.54 and 12.9b recommends the use of "12 a.m." for midnight and "12 p.m."
> for noon.
> Noon is actually M. Neither PM nor AM.