M is for meridian

[Alison Murie]

To me, 12M means noon, but I can see that for some it might suggest
midnight.  Nevertheless, to use 12PM to mean noon & 12AM to mean
midnight strikes me as totally absurd.  I see these usages frequently.
( It came to mind today when there are announcements of many demos &
rallies marking the anniversary of the Iraq invasion.  No doubt the
contexts will disambiguate the mistakes.)
AM

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