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

Other days

cuddle up

Cuddle Up Day
gum

Gum Day
reading

Reading Day
believe

Believe Day
offer

Offer Day
bow tie

Bow Tie Day
hoodie

Hoodie Day
stress awareness

Stress Awareness Day
ask out your crush

Ask Out Your Crush Day
one

One Day