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

Other days

stress awareness

Stress Awareness Day
cuddle up

Cuddle Up Day
believe

Believe Day
prosecco

Prosecco Day
bow tie

Bow Tie Day
donate your hair

Donate Your Hair Day
brow

Brow Day
my little pony

My Little Pony Day
polyamory

Polyamory Day
self appreciation

Self Appreciation Day