Father’s Day has been celebrated on March 19 as Saint Joseph’s
Day since the Middle Ages. In the United States, Father’s Day
was founded by Sonora Smart Dodd, and celebrated on the third
Sunday of June for the first time in 1910. The day is held on
various dates across the world, and different regions maintain
their own traditions of honoring fatherhood.

Memorial Day (originally known as Decoration Day) is a federal
holiday in the United States for mourning the U.S. military
personnel who have died while serving in the United States
armed forces. It is observed on the last Monday of May. It was
formerly observed on May 30 from 1868 to 1970.