安息日（希伯来语：שַׁבָּת‎，含有“休息，停止，终止”的意思）是犹太教每周一天的休息日，根据神的有关命令纪念神创世六日后休息的第七日。安息日在摩西获得的十诫中有明确指出。

根据摩西律法所定的安息制度，以色列人在每七天一次的圣日、每年几个特定的日子、 每七年一次和每五十年一次的圣年，都必须守安息。犹太人每七天所守的安息日，按照犹太历法，是从星期五日落起到星期六日落。当安息日开始时犹太教徒会点起蜡烛，而时间按当地日落时间而定。安息日是一个喜庆的日子。它是一个记念上帝和思考生命的精神层面，并花时间陪伴家人的一天。

Shabbat (/ʃəˈbɑːt/; Hebrew:שַׁבָּת‎ [ʃa'bat], "rest" or "cessation") or Shabbos (['ʃa.bəs], Yiddish:שבת‎) or the Sabbath is Judaism's day of rest and seventh day of the week, on which religious Jews and certain Christians (such as Seventh-day Adventists and Seventh-day Baptists) remember the Biblical creation of the heavens and the earth in six days and the Exodus of the Hebrews, and look forward to a future Messianic Age. Shabbat observance entails refraining from work activities, often with great rigor, and engaging in restful activities to honor the day. Judaism's traditional position is that unbroken seventh-day Shabbat originated among the Jewish people, as their first and most sacred institution, though some suggest other origins. Variations upon Shabbat are widespread in Judaism and, with adaptations, throughout the Abrahamic and many other religions.