The religious celebration of Easter is strictly attached to other traditional and religious events, namely Carnevale and, of course, Lent. Carnevale officially starts in January and lasts up until Ash Wednesday (the first day of Lent), the last three days before Lent being especially festive. Carnevale is best known to Americans as Mardi Gras, which are based upon the celebration of Shrove or "Fat" Tuesday (Martedì Grasso).