Sabbath

===Seventh-day===
{{Main article|Sabbath in seventh-day churches|List of Sabbath-keeping churches}}
Several Christian denominations observe Sabbath in a similar manner to Judaism, though with observance ending at Saturday sunset instead of Saturday nightfall. Early church historians [[Sozomen]] and [[Socrates of Constantinople|Socrates]] cite the seventh day as the Christian day of worship except for the Christians in Rome and Alexandria. Many Sabbatarian Judeo-Christian groups were attested during the Middle Ages. The [[Waldensians]], a religious group founded during the 12th century, are regarded as one of the first Post-Constantinian Christian groups to observe the seventh-day Sabbath. The [[Szekler Sabbatarians]] were founded in 1588 from among the [[Unitarian Church of Transylvania]] and maintained a presence until the group converted to Judaism in the 1870s. [[Seventh Day Baptist]]s have observed Sabbath on Saturday since the mid-17th century (either from sundown or from midnight), and influenced the (now more numerous) [[Seventh-day Adventists]] in America to begin the practice in the mid-19th century. They believe that keeping [[seventh-day Sabbath]] is a moral responsibility equal to that of any of the other [[Ten Commandments]], based on the example of [[Jesus]]. They also use "Lord's Day" to mean the seventh day, based on Scriptures in which God calls the day "my Sabbath" ({{Bibleverse||Exodus|31:13|KJV}}) and "to the {{LORD}}" ({{Bibleverse||Exodus|16:23|KJV}}) and in which Jesus calls himself "Lord of Sabbath" ({{Bibleverse||Matthew|12:8|KJV}}). The question of defining Sabbath worldwide on a round earth was resolved by some [[seventh-day Sabbatarian]]s by making use of the [[International Date Line]] (i.e., permitting local rest-day adjustment, {{Bibleverse||Esther|9:16–19|KJV}}), while others (such as some [[Alaska]]n Sabbatarians) keep Sabbath according to [[Jerusalem]] time (i.e., rejecting manmade temporal customs, {{Bibleverse||Daniel|7:25|KJV}}). Adherents of [[Messianic Judaism]] (a Christian sect or grouping of sects), also generally observe the Sabbath on Saturdays.

Many of the [[Lemba people|Lemba]] in [[southern Africa]], like some other African tribes, are Jewish and claim [[African Jews|common descent]] from the Biblical [[Israelites]], based on observing traditional Jewish customs. Genetic analysis has also demonstrated that a distinct group of the Lemba, have the oral history and genetic ancestry of early Hebrews. The Lemba keep one day a week holy like Sabbath, and maintain many beliefs and practices associated with Judaism.<ref>{{cite web|url=https://www.jpost.com/Jewish-World/Jewish-News/African-tribe-descended-from-Jews-DNA-tests-show|title = African tribe descended from Jews, DNA tests show}}</ref><ref>{{cite journal |last1=Thomas |first1=Mark G. |last2=Parfitt |first2=Tudor |last3=Weiss |first3=Deborah A. |last4=Skorecki |first4=Karl |last5=Wilson |first5=James F. |last6=le Roux |first6=Magdel |last7=Bradman |first7=Neil |last8=Goldstein |first8=David B. |title=Y Chromosomes Traveling South: The Cohen Modal Haplotype and the Origins of the Lemba—the 'Black Jews of Southern Africa' |journal=American Journal of Human Genetics |date=2000 |volume=66 |issue=2 |pages=674–686 |doi=10.1086/302749 |pmid=10677325 |pmc=1288118}}</ref>