Happy Fathers Day!
#1 It was celebrated over 100 years ago. The idea caught on but did not become an official US holiday until 1972.
#2 Fathers Day is more satisfying for dads than Mothers Day for dads. Moms expect to be relieved of chores on mothers day but usually are not. Hey! I still have to mow the lawn on Fathers Day.
3. Its is the 4th largest greeting card day of the year!