Oops, it doesn't look like 'weather service for the day' is a national day..

Other days

boy friend

Boy Friend Day
gallery

Gallery Day
blanket fort

Blanket Fort Day
artists

Artists Day
nae nae

Nae Nae Day
boba

Boba Day
cuddle up

Cuddle Up Day
singles

Singles Day
ruby

Ruby Day
brow

Brow Day