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

Other days

aloxolt

Aloxolt Day
pumpkin

Pumpkin Day
frozen yogurt

Frozen Yogurt Day
bow tie

Bow Tie Day
unicorn

Unicorn Day
youth

Youth Day
martini

Martini Day
kale

Kale Day
prosecco

Prosecco Day
ruby

Ruby Day