May 17

One of these ordinances is the clear prohibition in the Writings of Bahá'u'lláh of the consumption of alcoholic drinks. This has been explicitly revealed in His Most Holy Book, the Kitab-i-Aqdas. He states, "It is inadmissible that man, who hath been endowed with reason, should consume that which stealeth it away. Nay, rather it behooveth him to comport himself in a manner worthy of the human station, and not in accordance with the misdeeds of every heedless and wavering soul." In other Tablets, we read from His glorious Pen, "Beware lest ye exchange the Wine of God for your own wine, for it will stupefy your minds, and turn your faces away from the Countenance of God, the All-Glorious, the Peerless, the Inaccessible. Approach it not, for it hath been forbidden unto you by the behest of God, the Exalted, the Almighty." 
(From a letter dated March 30, 1997, written on behalf of the Universal House of Justice to an individual believer)