When someone obviously from the United States puts on airs by saying "an historical moment" like a Brit. The offender not only uses "an" instead of "a" but also pronounces the "h." While some leeway may be given to somebody who was educated outside of the United States, this pronunciation comes off as a bit affected if you are just an average American born and raised in the States.
by Ae5Ea8 March 11, 2015