Title: Word of Wisdom
Content:  Although it was first only a recommendation, it was made a commandment later on. This gave the saints time to adjust to the new principles. Originally, abiding by the recommendations and prohibitions of the Word of Wisdom was not considered mandatory: it explicitly declares itself to be "not by commandment or constraint". In February 1834, however, Joseph Smith proposed a resolution before the high council of the church that stated, "No official member in this Church is worthy to hold an office after having the word of wisdom properly taught him; and he, the official member, neglecting to comply with and obey it." This resolution was accepted unanimously by the council. In 1842, Smith's brother Hyrum, who was the Assistant President of 
Title: Word of Wisdom
Content:  wine; Relief Society general president Emmeline B. Wells drank coffee; and church president George Albert Smith drank brandy for medicinal purposes. In 1921, church president Heber J. Grant made adherence to the proscriptions of the Word of Wisdom an absolute requirement for entering the temple. Today, adherence to the proscriptions of the Word of Wisdom is required for baptism and for entry into temples of the LDS Church. BYU historian Thomas G. Alexander points out that while the original Word of Wisdom as a "principle with promise" was given by revelation, there is no evidence that any church leader has claimed a separate new revelation, or even a spiritual confirmation, of changing the Word of Wisdom from "a principle with promise" to a commandment.
Title: Word of Wisdom
Content:  The "Word of Wisdom" is the common name of an 1833 section of the Doctrine and Covenants, a book considered by many churches within the Latter Day Saint movement to consist of revelations from God. It is also the name of a health code based on this scripture, practiced by The Church of Jesus Christ of Latter-day Saints (LDS Church) and Mormon fundamentalists, and to a lesser extent, some other Latter Day Saint denominations. In the LDS Church, compliance with the Word of Wisdom is currently a prerequisite for baptism, service in full-time missionary work, attendance at church schools, and entry into the church's temples; however, 
Title: Word of Wisdom
Content:  Prophet [Joseph Smith] entered the room to give the school instructions he would find himself in a cloud of tobacco smoke. This, and the complaints of his wife at having to clean so filthy a floor, made the Prophet think upon the matter, and he inquired of the Lord relating to the conduct of the Elders in using tobacco, and the revelation known as the Word of Wisdom was the result of his inquiry. The Word of Wisdom was first published as a stand-alone broadsheet in December 1833. In 1835, it was included as Section LXXX in the first edition of the Doctrine and Covenants.
Title: Word of Wisdom
Content:  Adherence to the proscriptions of the Word of Wisdom was not made a requirement for entry into LDS Church temples until 1902. However, even then, church president Joseph F. Smith encouraged stake presidents to be liberal with old men who used tobacco and old ladies who drank tea. Of those who violated the revelation, it was mainly habitual drunkards that were excluded from the temple. Around the turn of the century, the proscriptions of the Word of Wisdom were not strictly adhered to by such notable church leaders. Anthon H. Lund, a First Counselor in the First Presidency, drank beer and wine; apostle Matthias F. Cowley drank beer and wine; Charles W. Penrose, who also served as a First Counselor in the First Presidency, 
Title: The Church of Jesus Christ of Latter-day Saints
Content:  The LDS Church asks its members to adhere to a dietary code called the Word of Wisdom, in which they abstain from the consumption of alcohol, coffee, tea, tobacco, and illicit or harmful substances. The Word of Wisdom also encourages the consumption of herbs and grains along with the moderate consumption of meat. When Joseph Smith published the Word of Wisdom in 1833 it was considered only advice; violation did not restrict church membership. During the 1890s, though, church leaders started emphasizing the Word of Wisdom more. In 1921, church president Heber J. Grant made obeying the Word of Wisdom a requirement to engage in worship inside of the faith's temples. From that time, church leadership has emphasized the forbidding of coffee, tea, tobacco, and alcohol, but not the other guidelines concerning meat, grains, and herbs.
Title: Word of Wisdom
Content:  According to Joseph Smith, the founder of the Latter Day Saint movement, the Word of Wisdom was received in 1833 as a revelation from God. After Smith's death, Brigham Young stated that the revelation was given in response to problems encountered while conducting meetings in the Smith family home: When they assembled together in this room after breakfast, the first they did was to light their pipes, and, while smoking, talk about the great things of the kingdom, and spit all over the room, and as soon as the pipe was out of their mouths a large chew of tobacco would then be taken. Often when 
Title: Word of Wisdom
Content:  The church's official statement on the interpretation of the Word of Wisdom is short: it reaffirms the long-standing meaning of "hot drinks" and extends the substances covered by prohibition: The only official interpretation of "hot drinks" (D&C 89:9) in the Word of Wisdom is the statement made by early Church leaders that the term "hot drinks" means tea and coffee. Members should not use any substance that contains illegal drugs. Nor should members use harmful or habit-forming substances except under the care of a competent physician. Although avoiding the prohibitions of the Word of Wisdom is a requirement for admission to 
Title: Mormon foodways
Content:  Section 89 of the Doctrine and Covenants, commonly known as the "Word of Wisdom" gives members dietary guidelines. It says to consume fruit seasonally, eat meat sparingly, and to eat grain, especially wheat, which is referred to as "the staff of life." The scripture prohibits consumption of alcohol, tobacco, and "hot drinks" (coffee and tea). The dietary restrictions in the Word of Wisdom were not consistently enforced until the 1900s, and in 1921 they became required for temple attendance. The increased enforcement in the 1920s coincided with the temperance movement, and perhaps grew from members of church leadership desiring approval from Protestants, who were 
Title: Temperance movement
Content:  The Word of Wisdom is a health code followed by the members of the Church of Jesus Christ of Latter-day Saints and other Latter Day Saint denominations which advises how to maintain good health: what one should do and what one should abstain from. One of the most prominent items in the Word of Wisdom is the complete abstinence from alcohol. When the Word of Wisdom was written, the Latter Day Saints were residing in Kirtland, Ohio and the Kirtland Temperance Society was organized on October 6, 1830, with 239 members. According to some scholars, the Word of Wisdom was influenced by the temperance movement. In June 1830, the Millenial Harbinger quoted from a book "The Simplicity of Health" which strongly condemned the use of alcohol and tobacco, and the untempered consumption 

Question: when did the word of wisdom become mandatory?
Answer: February 1834.