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 United States celebrates Mother's Day on the second Sunday in May. In 1872 Julia Ward Howe called for women to join in support of disarmament and asked for 2 June 1872, to be established as a "Mother's Day for Peace". Her 1870 "Appeal to womanhood throughout the world" is sometimes referred to as Mother's Day Proclamation. But Howe's day was not for honouring mothers but for organizing pacifist mothers against war. In the 1880s and 1890s there were several further attempts to establish an American "Mother's Day", but these did not succeed beyond the local level.