National Oatmeal Day is a real holiday; I'm not just making it up. Not a federally-recognized banking holiday, but a themed celebration, nonetheless. It's been somewhat under the radar.
In fact, just three years ago, satirical site The Oatmeal discovered the brand-driven holiday, themselves. In recent years, the celebration of oats has gained traction from local news outlets and nicely-aligned brands -- and not just purveyors of breakfast products, either.