Waadventista Wasabato ni Wakristo Waadventisti wa madhehebu yanayosisitiza ujio wa pili wa Yesu yakisema uko jirani kutokea na kwamba utawahi wafuasi wake wakishika Sabato, si Jumapili. Kati ya makundi yaliyoanzishwa Marekani baada ya utabiri wa William Miller kwamba ujio huo eti, utatokea tarehe 22 Oktoba 1844, lililoenea zaidi ni lile la Waadventista Wasabato (mwanzo rasmi mwaka 1863) ambalo kwa sasa lina waumini zaidi ya 17 milioni duniani kote. Butler, Jonathan. "From Millerism to Seventh-Day Adventism: Boundlessness to Consolidation", Church History, Vol. 55, 1986 Jordan, Anne Devereaux. The Seventh-Day Adventists: A History (1988) Land, Gary. Adventism in America: A History (1998) Land, Gary. Historical Dictionary of the Seventh-Day Adventists (2005) Morgan, Douglas. Adventism and the American Republic: The Public Involvement of a Major Apocalyptic Movement (University of Tennessee Press, 2001) ISBN 1-57233-111-9 Tarling, Lowell R. (1981). The Edges of Seventh-day Adventism: A Study of Separatist Groups Emerging from the Seventh-day Adventist Church (1844–1980). Barragga Bay, New South Wales: Galilee Publications, 81.