Sonora's father was born in June, so she chose to hold the first Father's Day celebration in Spokane, Washington on the 19th of June, 1910. President Calvin Coolidge, in 1924, supported the idea of a national Father's Day.
It's hard to define blues. On a literal angle, it's the dance you do to blues music, generally involving lots of improvisation, closeness, and hip movements. While swing and blues have basics, frames, and moves... blues doesn't.
The photograph shows Alvin Ailey's American Dance Theatre in Roots of the Blues. This ballet was Ailey's tribute to the Blues and its place in American black culture, and another example of his drawing on 'blood memories' to create dances.