I have observed these new national holidays. The especially bad things about these holidays are that (a) they are unscheduled and can happen on any day; and (b) they can happen multiple times in a year:

National Red Traffic Light Day

When every light you hit is red.

National Slow Driver Day

When every driver in front of you is lost, confused, or incompetent.

I’ve copied the entire contents of https://www.bar.com/bar-jokes/grammar-walks-into-a-bar here just in case that site ever disappears:

A dangling participle walks into a bar. Enjoying a cocktail and chatting with the bartender, the evening passes pleasantly.

A bar was walked into by the passive voice.

An oxymoron walked into a bar, and the silence was deafening.

Two quotation marks walk into a “bar.”

A malapropism walks into a bar, looking for all intensive purposes like a wolf in cheap clothing, muttering epitaphs and casting dispersions on his magnificent other, who takes him for granite.

Hyperbole totally rips into this insane bar and absolutely destroys everything.

A question mark walks into a bar?

A non sequitur walks into a bar. In a strong wind, even turkeys can fly.

Papyrus and Comic Sans walk into a bar. The bartender says, “Get out — we don’t serve your type.”

A mixed metaphor walks into a bar, seeing the handwriting on the wall but hoping to nip it in the bud.

A comma splice walks into a bar, it has a drink and then leaves.

Three intransitive verbs walk into a bar. They sit. They converse. They depart.

A synonym strolls into a tavern.

At the end of the day, a cliché walks into a bar — fresh as a daisy, cute as a button, and sharp as a tack.

A run-on sentence walks into a bar it starts flirting. With a cute little sentence fragment.

Falling slowly, softly falling, the chiasmus collapses to the bar floor.

A figure of speech literally walks into a bar and ends up getting figuratively hammered.

An allusion walks into a bar, despite the fact that alcohol is its Achilles heel.

The subjunctive would have walked into a bar, had it only known.

A misplaced modifier walks into a bar owned a man with a glass eye named Ralph.

The past, present, and future walked into a bar. It was tense.

A dyslexic walks into a bra.

A verb walks into a bar, sees a beautiful noun, and suggests they conjugate. The noun declines.

An Oxford comma walks into a bar, where it spends the evening watching the television getting drunk and smoking cigars.

A simile walks into a bar, as parched as a desert.

A gerund and an infinitive walk into a bar, drinking to forget.

A hyphenated word and a non-hyphenated word walk into a bar and the bartender nearly chokes on the irony.