Oops, it doesn't look like 'cathedral becomes a mosque for a day' is a national day..

Other days

aloxolt

Aloxolt Day
gum

Gum Day
me

Me Day
ponytail

Ponytail Day
hiv awareness

Hiv Awareness Day
raise awerness of zeus

Raise Awerness Of Zeus Day
tell a fairytale

Tell A Fairytale Day
tell ur crush you like them

Tell Ur Crush You Like Them Day
cat girl

Cat Girl Day
stress awareness

Stress Awareness Day