except the 4th of September for some reason
That's cause that's funny hat day.
You are bound by the eternal, Ethereal, incorporeal law to wear a funny hat that day.
If you are seen in the Ethereal on September 4th not wearing a funny hat or something that is headgear with at least a tiny bit of comedic value, you will be executed with true death.
You will cease to exist entirely if you don't wear a funny hat. Swear to loving Harbinger.