hmm. I would say:
There will never be a year that I will forget your birthday,
because for the world it was an important day.
You light up so many peoples lives and days
and give hope and joy to the ones who are bothered and lost there ways.
Every year my eyes are filled with tears and I feel blue,
because I miss you a lot and I can't be near to you.
So, Elvis, I send you this wish with all my heart and I pray:
That you'll have a happy birthday in heaven and a great day!
Be safe and take care,