Lyric discussion by ThatKidSteve 

Cover art for Bad Day lyrics by Daniel Powter

I personally envision a completely different meaning to this song (having not seen the video, and been having some unpleasant experiences as of late). I see it as "I" (i.e. Powter) trying to convince someone ("you" in the song) who's having a rough time, and is basically depressed, to snap out of it - the "bad day" is symbolic of the whole period of depression. Trouble is, the one he's singing about isn't making it easy for him. She's in a vicious cycle of depression and refuses to even try and get out: "You stand in the line just to hit a new low You're faking a smile with the coffee you go You tell me your life's been way off line"

And the guy's starting to get weary from it: "You're falling to pieces everytime And I don't need no carryin' on "

'cause however much he tries to convince her of her worth, she denies it and remains firmly depressed: "You say you don't know You tell me don't lie "

But he keeps trying because he knows that one day he'll break through to her: "You might not make it back and you know That you could be well all that strong And I'm not wrong"

Okay, so not all the lyrics fit, but on the most part this is how I see things. Like I said, I've been through this experience later and this song's been quite comforting...

@ThatKidSteve Nice interpretation... So, it's been almost 13 years, how are you doing now?