There might be so many reasons.
Maybe that fish last night was a little bit spicy, or the broccoli was making you a bit gassy. Maybe that had you feeling punkish all night, leading to a lousy night’s sleep.
Maybe there’s an anniversary coming up that you thought would be a cause for celebration, but you’re just not feeling the joy. Or maybe it’s the other way around, you’ve got something going on that you can’t put your finger on and that’s putting off from the celebration.
Maybe you’re feeling overwhelmed.
Maybe you’re feeling under appreciated.
Maybe you miss someone. Maybe someone’s showing up in your head at night and you don’t understand what they’re trying to tell you or why they can’t still be there when you wake up.
Maybe you saw or heard or read something that got stuck down in your subconscious like a burr that wiggles its way deep under your collar on your back. You can’t quite remember what it was or why it bothered you, but you know something’s not quite right.
(You hope that it’s not because you’re a closet asshole. You HATE people like that. Although being that guy and not realizing it would definitely qualify as a burr in the subconscious.)
But you can’t act grumpy at work, because it’s not their fault and it’s not their problem. You shouldn’t act grumpy at home, because, well, the same.
So you put on some good tunes, try to get some work done, maybe try to write a rambling piece on your website, keep smiling, keep putting one foot in front of another, and hope that tonight you either get some sleep or some answers.
Maybe tomorrow won’t be a day you’re just grumpy.