Mardi Gras history on the Mardi Gras music?

Mardi gras music is referred to as dixie. It is a combination of jazz, blues and zydeco.

Because it's a French expression and in French adjectives come after their nouns.

yes

That depends... If you mean Mardi Gras as a party holiday and not a day of 'religious' significance, then you probably party hard, joining street fairs, Carnival celebrations, etc. New Orleans is...

It is the day before Lent which is a movable date (as Easter). It is generally in February.