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

Other days

pumpkin

Pumpkin Day
hannah

Hannah Day
ask out your crush

Ask Out Your Crush Day
singles

Singles Day
stud

Stud Day
mean girls

Mean Girls Day
boba

Boba Day
bubble bath

Bubble Bath Day
first love

First Love Day
bow tie

Bow Tie Day