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

Other days

first love

First Love Day
self appreciation

Self Appreciation Day
nae nae

Nae Nae Day
lash

Lash Day
singles

Singles Day
comfy

Comfy Day
artists

Artists Day
ponytail

Ponytail Day
prosecco

Prosecco Day
special education

Special Education Day