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 DVD held their fifteenth live tour "Lead Upturn 2017 ～This is Our Day～". The live box charted at #59 on the Oricon DVD charts and #61 on the Blu-ray charts, remaining on the charts for one week. "Lead 15th Anniversary Live Box" is a DVD/Blu-ray two disc collection released by the Japanese hip-hop group Lead on December 20, 2017. It charted #59 on the Oricon DVD charts and #61 on the Oricon Blu-ray charts, where it remained on both for one week. The live box featured two separate performances spanning across two DVD/Blu-rays to celebrate the group's fifteenth anniversary in