Today, Sept. 24, is National Punctuation Day — admittedly, a created holiday, like National Donut Day, and, like National Donut Day, it’s a holiday that celebrates something worthy of celebration. (Yes, there are seven commas in that sentence. Plus a dash and an apostrophe, and the obligatory period.)

Punctuation is like road signs for writing. It tells us where to stop, where to slow down, when a turn is coming, and when rocks might be falling on us (well, not really). It helps readers get where they are going smoothly and safely.

But punctuation is a fairly recent development; in English it’s been around for a few centuries. Look at old manuscripts and you’ll see writing with no spaces, no punctuation and no capital letters. It’s hard to read. It’s slow. It’s confusing. Once punctuation arrived, though, it wasn’t set in stone: the rules have been changing over time. Read Victorian English literature and you’ll see semicolons sprinkled in places they aren’t seen today. Regardless, the reason for using punctuation is to make writing easier to read and easier to understand.

As M. Alderton Pink put it, “Bad punctuation is, in fact, a form of bad manners.” And, like many matters of etiquette, certain aspects of punctuation are open to debate: Oxford comma or not? Are semicolons elegant or awful? Should we get rid of apostrophes? (Read James Harbeck’s modest proposal “Kill the Apostrophe” and MedEditor’s response.)

Others, however, are not. Commas in the wrong places can confuse, mislead or even cost you a million dollars. Apostrophes in the wrong places make a writer look sloppy or ignorant, or can even affect your love life.

Properly used punctuation helps make writing clearer, and clarity is always good, so for that reason alone it’s worth a holiday.

To celebrate, you can:

• Download a free punctuation icon set from WinePress Publishing.
• (If you’re not offended by F-bombs) Watch the “Oxford Comma” video from Vampire Weekend or the “Semicolon” video from The Lonely Island (you’ll spot mistakes, but watch all the way to the end).
• Play the “Save the Comma” game (for kids, but it’s cute).
• Take the Apostrophe Quiz at the Bremner Center.
• Follow @suebb’s example and bake punctuation cookies. That would make today even better than National Donut Day!