It's been a hard day's day, and I've been working in my lab
It's been a hard day's day, I should be sleeping after that
Although I'm still home to you, I have the things that I knew
Will make you feel alright

You know, "what a fine day for science", I said that this morning
And it's worth it just to hear you say that phrase 'cause it's not boring
Although that I am still home, even I was all alone
You know I feel okay
In my lab, everything seems to be right
In my lab, science is still on my side
It's been a hard day's day, and I've been working in my lab
It's been a hard day's day, I should be sleeping after that
My sister didn't come here to my lab, oh dear
But something's not right...

Owwww

Check out my high-five machine, it's not kinda that obscene
You know I feel okay
Though I tried to keep my upper lip stiff
Though I knew I'm a Capricorn, get it? Well, get a grip, yeah

It's been a hard day's day, and I've been working in my lab
It's been a hard day's day, I should be sleeping after that
I've made the moon come down to earth all over town
Now things aren't alright
It would be a bad night
Now this was a bad night