《Best Days》的詞曲作者是Billy Talent樂隊，其歌詞如下：
Verse 1：
I've been up， I've been down
Been through the good， been through the bad
I've been high， I've been low
But I'm holding on， I'm holding on
Chorus：
These are the best days of my life
Sun is shining， sky is blue
These are the best days of my life
Gonna make them count， gonna make them good
Verse 2：
I've been lost， I've been found
Been on my feet， been on my knees
But I'm standing up， I'm standing tall
And I'm not giving up， I'm not giving up
Chorus：
These are the best days of my life
Sun is shining， sky is blue
These are the best days of my life
Gonna make them count， gonna make them good
Bridge：
Gonna live it up， gonna seize the day
Gonna make every second count today
Gonna make every moment mean something
Gonna make every memory worth remembering
Chorus：
These are the best days of my life
Sun is shining， sky is blue
These are the best days of my life
Gonna make them count， gonna make them good
Gonna make every second count today
Gonna live it up， gonna live it up now
Outro：
These are the best days of my life.
這是一首充滿希望和活力的歌曲，表達了作者對美好生活的嚮往和珍惜。歌詞鼓勵人們珍惜當下，活在當下，讓每一天都充滿意義和價值。