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

Other days

youth

Youth Day
coffee

Coffee Day
martini

Martini Day
self appreciation

Self Appreciation Day
bubble bath

Bubble Bath Day
law

Law Day
bow tie

Bow Tie Day
ask out your crush

Ask Out Your Crush Day
singles

Singles Day
nae nae

Nae Nae Day