Oops, it doesn't look like 'field field day' is a national day..

Other days

lumpy rug

Lumpy Rug Day
self care

Self Care Day
singles

Singles Day
pumpkin

Pumpkin Day
ruby

Ruby Day
raise awerness of zeus

Raise Awerness Of Zeus Day
comfy

Comfy Day
china

China Day
lisp

Lisp Day
boba

Boba Day