Being a father is a huge responsibility and I am very proud that I have been able be a positive influence in my children's and grand children's lives. It is a special day at my house today!

Much like another respondent to your well wishes, I would like to add, I too am a parent of 2 adult children, and a grandchild.  
Fatherhood has its challenges, I raised both children as a single parent, with full custody of the children, and next to no involvement from the Ex, so you can only imagine the huge responsibility that I had resting on my shoulders.

Of all of the titles that I have held in life, the most rewarding, and meaningful, to me, is that of the title of Dad.
Happy Fathers day to all the Dads !