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 the music industry, having debuted on July 31, 2002 with the song "Manatsu no Magic". The first DVD/Blu-ray featured the live performed to celebrate their anniversary, "Lead 15th Anniversary Live ～Kan Ima Shirube-sai～" (感今導祭 / "Guiding Emotions"), which the group held on July 29th and July 30th at the Maihama Amphitheater. The second disc held their fifteenth live tour "Lead Upturn 2017 ～This is Our Day～" - the performance which was performed at Cosmos Theater (Kaizuka City Civic Cultural Hall) in Kaizuka, Osaka on September 10th. Bonuses on both discs featured behind-the-scenes footage of both concerts and the collection of