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

Other days

ruby

Ruby Day
nail polish

Nail Polish Day
kale

Kale Day
coffee

Coffee Day
youth

Youth Day
ride the wind

Ride The Wind Day
aloxolt

Aloxolt Day
brow

Brow Day
ask out your crush

Ask Out Your Crush Day
pick me

Pick Me Day