The Seventh-day Adventist Church is a mainstream Protestant church with approximately 19 million members worldwide, including more than one million members in North America. The Adventist Church operates 173 hospitals and sanitariums and more than 7,500 schools around the world. The Adventist Development and Relief Agency (ADRA) works within communities in more than 130 countries to provide community development and disaster relief.

Judah ha-Levi (12th century) proposed a nascent Jewish date line for dating of Shabbat, later calculated to fall between China and Japan (other lines exist, and travelers are expected to note both personal and local Shabbat); and Pinchas Elijah Horovitz (18th century) stated that polar regions should observe Shabbat based on calculating 24-hour days, although without establishing a date line.

Nineteen school districts exist within the city of Houston. The Houston Independent School District (HISD) is the seventh-largest school district in the United States and the largest in Texas.[237] HISD has 112 campuses that serve as magnet or vanguard schools—specializing in such disciplines as health professions, visual and performing arts, and the sciences. There are also many charter schools that are run separately from school districts. In addition, some public school districts also have their own charter schools.
While critics such as Hoekema have classified Adventism as a sectarian group on the basis of its atypical doctrines,[18][19] it has been accepted as more mainstream by Protestant evangelicals since its meetings and discussions with evangelicals in the 1950s.[105] Notably, Billy Graham invited Adventists to be part of his crusades after Eternity, a conservative Christian magazine edited by Donald Barnhouse, asserted in 1956 that Adventists are Christians, and also later stated, "They are sound on the great New Testament doctrines including grace and redemption through the vicarious offering of Jesus Christ 'once for all'".[106] Walter Martin, who is considered by many to be the father of the counter-cult apologetics movement within evangelicalism, authored The Truth About Seventh-day Adventists (1960) which marked a turning point in the way Adventism was viewed.[107][108]
Adventist doctrine resembles trinitarian Protestant theology, with premillennial and Arminian emphases. Adventists uphold teachings such as the infallibility of Scripture, the substitutionary atonement, the resurrection of the dead and justification by faith alone, and are therefore often considered evangelical.[29] They believe in baptism by immersion and creation in six literal days. The modern Creationist movement started with Adventist George McCready Price, who was inspired by a vision of Ellen White.[30]
"He points to the close association of new-moon and Sabbath in nearly all the pre-exilic references (Amos 8:5; Hosea 2:11; Isaiah 1:13; 2 Kings 4:23); and concludes that in early Israel, as in Babylonia, the Sabbath was the full-moon festival and nothing else. The institution of the weekly Sabbath he traces to a desire to compensate for the loss of the old lunar festivals, when these were abrogated by the Deuteronomic reformation. This innovation he attributes to Ezekiel; but steps toward it are found in the introduction of a weekly day of rest during harvest only (on the ground of Deuteronomy 16:8; compare Exodus 34:21), and in the establishment of the sabbatical year (Leviticus 25), which he considers to be older than the weekly Sabbath" (ICC on Gen, p. 39). Dr. Skinner well says that Meinhold's theory involves great improbabilities. It is not certain that the Babylonians applied the term sabattu to the 15th day of the month because it was the day of the full moon; and it is by no means certain that the early prophets in Israel identified Sabbath with the festival of the full moon.
Critics have alleged that certain Adventist beliefs and practices are exclusivist in nature and they point to the Adventist claim to be the "remnant church", and the traditional Protestant association of Roman Catholicism with "Babylon".[125][126][127] These attitudes are said to legitimize the proselytising of Christians from other denominations. In response to such criticisms, Adventist theologians have stated that the doctrine of the remnant does not preclude the existence of genuine Christians in other denominations, but is concerned with institutions.[128]
All are agreed that Christ and His disciples observed the seventh-day Sabbath previous to the crucifixion. That His followers had received no intimation of any proposed change at His death, is evident from the recorded fact that on the day when He was in the tomb they rested, "on the sabbath .... according to the commandment" (Luke 23:56); and that they treated the following day, the first day of the week, the same as of old, is further evident, as upon that day they came unto the sepulcher for the purpose of anointing the body of Jesus. In the Book of Acts, which gives a brief history of the work of the disciples in proclaiming the gospel of a risen Saviour, no other Sabbath is recognized than the seventh day, and this is mentioned in the most natural way as the proper designation of a well-known institution (Acts 13:14,27,42; 16:13; 18:4).
^{Without a doubt, most professing Christians accept Sunday as the New Testament Lord's Day. Muslims observe Friday. Some religions observe no day. But there are those who insist the seventh-day Sabbath is still binding. Few take the Sabbath seriously—in fact, the vast majority of Christians have never looked into this question. Most never question Sunday-observance, unwittingly following the traditions of men rather than the clear command of God!}
"Should Adventists cooperate ecumenically? Adventists should cooperate insofar as the authentic gospel is proclaimed and crying human needs are being met. The Seventh-day Adventist Church wants no entangling memberships and refuses any compromising relationships that might tend to water down her distinct witness. However, Adventists wish to be "conscientious cooperators." The ecumenical movement as an agency of cooperation has acceptable aspects; as an agency for the organic unity of churches, it is much more suspect."[101]
Houston is home to 337 parks, including Hermann Park, Terry Hershey Park, Lake Houston Park, Memorial Park, Tranquility Park, Sesquicentennial Park, Discovery Green, Buffalo Bayou Park and Sam Houston Park. Within Hermann Park are the Houston Zoo and the Houston Museum of Natural Science. Sam Houston Park contains restored and reconstructed homes which were originally built between 1823 and 1905.[199] A proposal has been made to open the city's first botanic garden at Herman Brown Park.[200]
The Metropolitan Transit Authority of Harris County (METRO) provides public transportation in the form of buses, light rail, high-occupancy vehicle (HOV) lanes, and paratransit to fifteen municipalities throughout the Greater Houston area and parts of unincorporated Harris County. METRO's service area covers 1,303 square miles (3,370 km2) containing a population of 3.6 million.[271]

^ Davis, Aaron; Gillum, Jack; Tran, Andrew. "How Houston's 'Wild West' growth may have contributed to devastating flooding". Washington Post. Retrieved September 10, 2018. Growth that is virtually unchecked, including in flood-prone areas, has diminished the land's already-limited natural ability to absorb water, according to environmentalists and experts in land use and natural disasters. ... Since 2010, at least 7,000 residential buildings have been constructed in Harris County on properties that sit mostly on land the federal government has designated as a 100-year flood plain, according to a Washington Post review of areas at the greatest risk of flooding.

The Seventh-day Adventist Church is the largest of several Adventist groups which arose from the Millerite movement of the 1840s in upstate New York, a phase of the Second Great Awakening. William Miller predicted on the basis of Daniel 8:14–16 and the "day-year principle" that Jesus Christ would return to Earth between the spring of 1843 and the spring of 1844. In the summer of 1844, Millerites came to believe that Jesus would return on October 22, 1844, understood to be the biblical Day of Atonement for that year. Miller's failed prediction became known as the "Great Disappointment".