Shabbat, also called the Sabbath, is the Jewish day of rest on the seventh day of the week, which is Saturday. It is a day of rest and abstention from work as commanded by God. Shabbat observance entails refraining from work activities, often with great rigor, and engaging in restful activities to honor the day. The word "Shabbat" comes from the root Shin-Beit-Tav, meaning to cease, to end, or to rest. Shabbat is a festive day when Jews exercise their freedom from the regular labors of everyday life. It offers an opportunity to contemplate the spiritual aspects of life and to spend time with family. Shabbat is the most important ritual observance in Judaism, and it is the only ritual observance instituted in the Ten Commandments. Shabbat is also the most important special day, even more important than Yom Kippur. The end of Shabbat is traditionally marked by a ritual called Havdalah, during which blessings are said over wine (or grape juice), aromatic spices, and light, separating Shabbat from the rest of the week.