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

Other days

bow tie

Bow Tie Day
slime

Slime Day
gum

Gum Day
boba

Boba Day
lash

Lash Day
self appreciation

Self Appreciation Day
kale

Kale Day
tell ur crush you like them

Tell Ur Crush You Like Them Day
cuddle up

Cuddle Up Day
boyfriend

Boyfriend Day