Watch this amazing cover of "Dayman" from 'It's Always Sunny In Philadelphia'

If you don't know the song "Dayman" please stop reading this right now.

Go to your TV or computer and begin watching the greatest show on TV ever!

If you have seen 'It's Always Sunny' then your day is going to get so much better man...

This cover of Charlie & Dennis' "Dayman" is so bloody good and hopefully, Charlie Day sees this very soon.

Not sure if this band is called "Chemical Toilet"...

It wouldn't be an 'It's Always Sunny' moment without falling down a YouTube hole so please enjoy the complete 'Nightman/Dayman' saga.

Plus, don't forget the time Portugal. The Man played a cover of "Dayman" live.