Oops, it doesn't look like 'facepalm meme stockpile will be exhausted by memorial day' is a national day..

Other days

china

China Day

Emoji Day

pumpkin

Pumpkin Day

coffee

Coffee Day

chocolate milkshake

Chocolate Milkshake Day

tulip

Tulip Day

lost sock memorial

Lost Sock Memorial Day

special education

Special Education Day

eat what you want

Eat What You Want Day

reading

Reading Day