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

Other days

gum

Gum Day
ask out your crush

Ask Out Your Crush Day
boba

Boba Day
offer

Offer Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
healing

Healing Day
one

One Day
tell ur crush you like them

Tell Ur Crush You Like Them Day
hiv awareness

Hiv Awareness Day
kiss a ginger

Kiss A Ginger Day