This needs many traditions, holidays, locations, and more for the world!
Can you help me with my world?
There could be a holiday celebrating Henry Crabson (Maybe his ancestors?).
I'm not sure about any customs or traditions, but crabs could be considered sacred and forbidden as food.
I bet a crab would be in the Macy's parade and Sebastian from The Little Mermaid is hailed as a legend.
^This is the international anthem