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

Other days

lumpy rug

Lumpy Rug Day
kale

Kale Day
frozen yogurt

Frozen Yogurt Day
book

Book Day
stud

Stud Day
my little pony

My Little Pony Day
ruby

Ruby Day
bounce

Bounce Day
tell ur crush you like them

Tell Ur Crush You Like Them Day
slime

Slime Day