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

Other days

ask out your crush

Ask Out Your Crush Day
fiancee

Fiancee Day
boba

Boba Day
pampering

Pampering Day
bow tie

Bow Tie Day
nail polish

Nail Polish Day
self care

Self Care Day
kiss a ginger

Kiss A Ginger Day
china

China Day
gum

Gum Day