August 31

In the Bayán the Báb allowed the use of gold and silver utensils, thus abrogating the Islamic condemnation of their use which stems not from an explicit injunction of the Qur’án but from Muslim traditions. Bahá’u’lláh… confirms the Báb’s ruling. 
- The Universal House of Justice  (The Notes section of the Kitab-i-Aqdas)