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

Other days

cursing

Cursing Day
self appreciation

Self Appreciation Day
promposal

Promposal Day
healing

Healing Day
ruby

Ruby Day
china

China Day
latina equal pay

Latina Equal Pay Day
tulip

Tulip Day
bonang

Bonang Day
lumpy rug

Lumpy Rug Day