[Your letterhead, if desired; if not, your return address]
[Date of letter-month, day, and year]
[Recipient's first and last names]
[Street or P.O. box address]
[City, State ZIP code]
Dear [recipient's name]:
Ever since you were a young child, I have been looking forward to the day when you would become a parent yourself, and when I would become a grandparent. Now that this special time in your life has come, I am so grateful that you have your own two beautiful children. You have transformed into such a loving and wise father, and I love watching you learn and grow in the process.
I will see you this weekend for our special Father's Day celebration and are really looking forward to it!
[Sender's first and last names]