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

Other days

boba

Boba Day
bow tie

Bow Tie Day
reading

Reading Day
cursing

Cursing Day
stud

Stud Day
lost sock memorial

Lost Sock Memorial Day
pick me

Pick Me Day
eat what you want

Eat What You Want Day
believe

Believe Day
gum

Gum Day