Go through these links and study the material on US holidays.
https://www.youtube.com/watch?v=uG4XyNqUQxg
https://www.youtube.com/watch?v=LJR7aBc77cQ
https://www.youtube.com/watch?v=NJeYq6cmwUk
https://www.youtube.com/watch?v=uwwBrtRE8YQ
https://www.youtube.com/watch?v=FJamea576YY
https://www.youtube.com/watch?v=CR3BbWsL-zI
https://www.youtube.com/watch?v=yb7MI8NQLoo
https://www.youtube.com/watch?v=mIL82j_A-bA
https://www.youtube.com/watch?v=yKWGBWQZq3A