Oops, it doesn't look like 'water bottle refill day' is a national day..

Other days

ruby

Ruby Day
my little pony

My Little Pony Day
first love

First Love Day
pick me

Pick Me Day
pampering

Pampering Day
boba

Boba Day
boy friend

Boy Friend Day
get funky

Get Funky Day
china

China Day
me

Me Day