Wedding anniversary years have well-established connections now common to most nations: 5th Wood, 10th Tin, 15th Crystal, 20th China, 25th Silver, 30th Pearl, 35th Jade, 40th Ruby, 45th Sapphire, 50th Gold, 60th Diamond, and 70th Platinum. In English speaking countries the first, wooden, gift was cut on the day of celebration and then presented to the wife as a finished article before the next two quarter days had passed. The modern tradition may have originated in medieval Germany where, if a married couple lived to celebrate the 25th anniversary of their wedding, the wife was presented by her friends and neighbours with
Puyo Puyo! 15th Anniversary from the Madou series, who serve as boss characters in the story modes. As "Puyo Puyo! 15th Anniversary" was created to commemorate the fifteenth anniversary of Puyo Puyo, it includes most of the "Fever" characters plus six of the characters from the "Madou" series; they are said to have fallen from the sky into Primp Town, the primary setting of the Fever series games. There are a total of twenty-two characters in this game. 15th Anniversary has a slew of new modes, and also includes modes that emulate the original "Puyo Puyo", "Puyo Puyo Tsu" and "Puyo Pop Fever". In