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

Other days

artists

Artists Day
stress awareness

Stress Awareness Day
offer

Offer Day
reading

Reading Day
get funky

Get Funky Day
kale

Kale Day
nail polish

Nail Polish Day
nae nae

Nae Nae Day
hoodie

Hoodie Day
boyfriend

Boyfriend Day