Oops, it doesn't look like 'gyro cherry popover day' is a national day..

Other days

frozen yogurt

Frozen Yogurt Day
prescription drug take back

Prescription Drug Take Back Day
bounce

Bounce Day
kale

Kale Day
self appreciation

Self Appreciation Day
youth

Youth Day
reading

Reading Day
pumpkin

Pumpkin Day
bow tie

Bow Tie Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day