Father's Day
Father's Day was not celebrated in the US, outside Catholic traditions, until the 20th century. As a civic celebration in the US, it was inaugurated in the early 20th century to complement Mother's Day by celebrating fathers and male parenting.
After Anna Jarvis' successful promotion of Mother's Day in Grafton, West Virginia, the first observance of a "Father's Day" was held on July 5, 1908, in Fairmont, West Virginia, in the Williams Memorial Methodist Episcopal Church South, now known as Central United Methodist Church. Grace Golden Clayton was mourning the loss of her father, when in December 1907, the Monongah Mining Disaster in nearby Monongah killed 361 men, 250 of them fathers, leaving around a thousand fatherless children. Clayton suggested that her pastor Robert Thomas Webb honor all those fathers.
Mother's Day
The modern holiday of Mother's Day was first celebrated in 1908, when Anna Jarvis held a memorial for her mother at St Andrew's Methodist Church in Grafton, West Virginia. St Andrew's Methodist Church now holds the International Mother's Day Shrine. Her campaign to make Mother's Day a recognized holiday in the United States began in 1905, the year her mother, Ann Reeves Jarvis, died. Ann Jarvis had been a peace activist who cared for wounded soldiers on both sides of the American Civil War, and created Mother's Day Work Clubs to address public health issues. Anna Jarvis wanted to honor her mother by continuing the work she started and to set aside a day to honor all mothers because she believed a mother is "the person who has done more for you than anyone in the world".