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

Other days

stress awareness

Stress Awareness Day
self appreciation

Self Appreciation Day
buddy

Buddy Day
azonto is acceptable

Azonto Is Acceptable Day
bubble bath

Bubble Bath Day
promposal

Promposal Day
self care

Self Care Day
mean girls

Mean Girls Day
artists

Artists Day
my little pony

My Little Pony Day