Happy happy oh my friend   Blow out candles once again   Leave the presents all inside   Take my hand and let's take a ride      Backwards down the number line   You were eight and I was nine   Do you know what happened then   Do you know why we're still friends      Laughing all these many years   We've pushed through hardships tasted tears   We made a promise one to keep   I can still recite it in my sleep      Every time a birthday comes   Call your friend and sing a song   Or whisper it in to his ears   Or write it down just don't miss a year      You decide what it contains   How long it goes   But this remains   The only rule is it begins   Happy happy oh my friend      You decide what it contains   How long it goes   But this remains   The only rule is it begins      And all my friends come   Backwards down the number line      All my friends come   Backwards down the number line      All my friends come   Backwards down the number line      All my friends      You decide what it contains   How long it goes   But this remains   The only rule is it begins   Happy happy oh my friend      You decide what it contains   How long it goes   But this remains   The only rule is it begins      And all my friends come   Backwards down the number line      All my friends come   Backwards down the number line      All my friends come   Backwards down the number line      All my friends      And all my friends come   Backwards down the number line      All my friends come   Backwards down the number line      All my friends come   Backwards down the number line      All my friends