Ай сайынғы ораза күні және куәліктер жиыны

Monthly practice in the Church of Jesus Christ of Latter day Saints

Fast Sunday (previously Fast Day) is a Sunday set aside by the Church of Jesus Christ of Latter day Saints for fasting by its members. On Fast Sunday, a fast and testimony meeting is held by local congregations of the Church of Jesus Christ of Latter day Saints.

On Fast Sunday, church members are encouraged to fast for two consecutive meals. Members are also encouraged to give the money they save by not eating as a fast offering, which will be used by the church to financially assist those in need. On Fast Sunday, the sacrament meeting is known as fast and testimony meeting. In this meeting, rather than predetermined speakers on particular subjects, the members are given the chance to voluntarily bear extemporaneous testimony to one another of gospel truths. Non members of the church are welcome to participate in Fast Sunday activities. Fast Sunday is usually the first Sunday of each month. In some circumstances, the week of Fast Sunday may be adjusted by church leaders. In many areas of the world, this occurs in April and October, when the church's general conferences are held on the first Sunday of the month. They may also be adjusted due to stake conferences or temple dedications that are held on the first Sunday of the month. In addition to the regular Fast Sunday, individuals, families, wards, or stakes may designate additional fast days for special needs of individuals, families, communities, or the church. No fast and testimony meeting is held for these non regular fast days.

The LDS practice of intermittent fasting has been studied in the context of Mormons' lower rate of coronary artery disease and cardiac mortality. While this phenomenon has been attributed to LDS Church's prohibition on tobacco and alcohol use, fasting practices have also been hypothesized to play a role.