Are Three days Grace a Christian rock band..?

Three days Grace? Is that referring to the three days between Jesus
death and resurrection
and the lyrics to Never too late:

This world will never be
What I expected
And if I don't belong
Who would have guessed it
I will not leave alone
Everything that I own
To make you feel like it's not too late
It's never too late

Even if I say
It'll be alright
Still I hear you say
You want to end your life
Now and again we try
To just stay alive
Maybe we'll turn it all around
'Cause it's not too late
It's never too late

how could that not be christian? I'm wondering cause someone
recommended me the song so I just assumed it was christian, but
apparently they've got songs about rough sex lol

just wondering - thanks