Why Do Shirts Have a Horizontal Button Hole at the Bottom?

The question isn't as sideways as you might think.

Proper Placements for Buttons & Buttonholes

Why is the bottom button hole on my shirt horizontally oriented instead of vertical like all the others? : r/whatisthisthing

Why, on most men's button-down shirts, is the bottom-most button slit horizontal, not vertical like the rest? - Quora

The Correct Position of Buttons and Buttonholes - Designer Stitch

How to do the Buttonhole Stitch - Sarah's Hand Embroidery Tutorials

Why Do Shirts Have a Horizontal Button Hole at the Bottom?

The History Behind 5 Strange Style Norms Explained — Masciangelo

Further Details

Horizontal or vertical buttonholes? – ooobop

Why, on a typical shirt, are the bottom and top buttonhole slits horizontal, when the rest of the button hole slits are vertical? - Quora

Competitive Pricing Whats The Difference Between Button Up And

One Row Buttonholes - Ysolda