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
Lead 15th Anniversary Live Box Lead 15th Anniversary Live Box Lead 15th Anniversary Live Box: Special Box Shiyou (スペシャルBOX仕様 / "Special Box Specification") is a special live DVD collection released by the Japanese hip-hop group Lead on December 20, 2017. The live box featured two separate performances spanning across two DVDs to celebrate the group's fifteenth anniversary in the music industry, having debuted in 2002 with the song "Manatsu no Magic". The first DVD featured the live performed to celebrate their anniversary, "Lead 15th Anniversary Live ～Kan Ima Shirube-sai～", which the group held on July 29th and July 30th of that year; while the second