Oops, it doesn't look like 'guard pilot for a day' is a national day..

Other days

artists

Artists Day
slime

Slime Day
blanket fort

Blanket Fort Day
youth

Youth Day
unicorn

Unicorn Day
ruby

Ruby Day
boba

Boba Day
reading

Reading Day
kale

Kale Day
ask out your crush

Ask Out Your Crush Day