Question: When did mother's day become a holiday?

Disambiguated questions and answers:
context: 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".
question: When was Mothers Day holiday first celebrated?
short_answers: 1908
wikipage: Mother's Day
context: In 1908, the U.S. Congress rejected a proposal to make Mother's Day an official holiday, joking that they would also have to proclaim a "Mother-in-law's Day". However, owing to the efforts of Anna Jarvis, by 1911 all U.S. states observed the holiday, with some of them officially recognizing Mother's Day as a local holiday (the first being West Virginia, Jarvis' home state, in 1910). In 1914, Woodrow Wilson signed a proclamation designating Mother's Day, held on the second Sunday in May, as a national holiday to honor mothers.
question: When did Mothers day become a holiday observed by all states?
short_answers: 1911
wikipage: Mother's Day
context: In 1908, the U.S. Congress rejected a proposal to make Mother's Day an official holiday, joking that they would also have to proclaim a "Mother-in-law's Day". However, owing to the efforts of Anna Jarvis, by 1911 all U.S. states observed the holiday, with some of them officially recognizing Mother's Day as a local holiday (the first being West Virginia, Jarvis' home state, in 1910). In 1914, Woodrow Wilson signed a proclamation designating Mother's Day, held on the second Sunday in May, as a national holiday to honor mothers.
question: When did mothers day become an official national holiday?
short_answers: 1914
wikipage: Mother's Day

Long-form answers:
knowledge: content: Mother's Day is a celebration honoring the mother of the family or individual, as well as motherhood, maternal bonds, and the influence of mothers in society.
wikipage: Mother's Day
long_answer: Mother's Day is a celebration honoring the mother of the family or individual, as well as motherhood, maternal bonds, and the influence of mothers in society. 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. However, owing to the efforts of Anna Jarvis, by 1911 all U.S. states observed the holiday, with some of them officially recognizing Mother's Day as a local holiday. In 1914, Woodrow Wilson signed a proclamation designating Mother's Day, held on the second Sunday in May, as a national holiday to honor mothers.