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

Other days

nae nae

Nae Nae Day
lash

Lash Day
self appreciation

Self Appreciation Day
singles

Singles Day
martini

Martini Day
ride the wind

Ride The Wind Day
promposal

Promposal Day
unicorn

Unicorn Day
self care

Self Care Day
china

China Day