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

Other days

hoodie

Hoodie Day
ruby

Ruby Day
law

Law Day
nail polish

Nail Polish Day
donate your hair

Donate Your Hair Day
youth

Youth Day
nae nae

Nae Nae Day
stud

Stud Day
tell ur crush you like them

Tell Ur Crush You Like Them Day
pick me

Pick Me Day