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

Other days

ask out your crush

Ask Out Your Crush Day
eat what you want

Eat What You Want Day
get funky

Get Funky Day
cursing

Cursing Day
ruby

Ruby Day
bounce

Bounce Day
lash

Lash Day
boba

Boba Day
martini

Martini Day
offer

Offer Day