New Orleans is home to one of the world's greatest parties.  Like other Carnival celebrations, Mardi Gras grew from the Christian practice of feasting and celebrating on 'Mardi Gras' – which means 'Fat' Tuesday - on Shrove Tuesday, just before the solemn fasting of the 40-day pre-Easter season of Lent.  The actual dates differ every year.  Shrove Tuesday can happen during February or early March, and Carnival season begins immediately after the 12th day of Christmas, continuing up to the...