[Migraine]

It's National Grammar Day! Today!

There is a grammar flub right in the headline. "Today!" can't stand by itself, not even in headline speak. Plus, it's redundant. When the headline already said "It is Grammar Day", present tense, that means "today".

[Flaming Conservative]

There is a grammar flub right in the headline.

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I believe the requirement for proper grammar, etc., was dropped from journalism curricula many years ago.