Quote:
Originally Posted by Quoth
It's not even USA usage. See AP and some US newspaper style guides. It's not like Webster's spelling (prescriptive vs OED reflecting usage).
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FWIW, the CMOS (Chicago Manual of Style) recommends
a.m. and p.m. which are
nearly the easiest to type. I was sort of hoping they'd morphed to am pm, but nope, they still use the periods.
I agree with DNSB--whatever you use, just be consistent.
Hitch