I love you and I miss you, Dad,
and though you've passed away,
you'll never be forgotten,
for I think of you each day.

If heaven celebrates this day
how special it will be.
A gathering of the many dads
upon our family tree.

Your father and grandfather
and great grandfather too.
How wonderful it is, if they
can spend this day with you.

May you know how much I love you
though I'm here and you are there.
Happy Father's Day in heaven
to the best dad anywhere

Source: http://www.familyfriendpoems.com/poem/fathers-day-in-heaven