A distinctive feature of Seventh-day Adventist belief and practice is the observance of the seventh day of the week as the Sabbath, from sunset on Friday to sunset on Saturday, in contrast with the almost universal Christian observance of Sunday. Seventh-day Adventists postulate their belief and practice on the explicit statements of Scripture setting apart the seventh day of the week as a day of rest, on the fact that the distinctive character with which God invested the day is never rescinded in Scripture, on the absence of any recorded transfer of the sacredness of the Sabbath to Sunday or any affirmation of Sunday sacredness, and on the lack of any recorded instance of the observance of the first day of the week as a sabbath by NT Christians. The fundamental basis for Seventh-day Adven...

From the Seventh-day Adventist Encyclopedia. Published with permission from the Review and Herald Publishing Association.