שַׁבָּת

Shabbat (שַׁבָּת) comes from the Hebrew root ש-ב-ת (sh-b-t), meaning 'to cease' or 'to rest.' It's the seventh day, when God rested from creation and commanded humans to do the same.

The Jewish Sabbath — sundown Friday to sundown Saturday — was revolutionary: a mandated day of rest for everyone, including slaves and animals. No other ancient culture had this.

Christianity moved its rest day to Sunday (the day of resurrection), and Islam to Friday (Jumu'ah). But all three Abrahamic religions preserve the concept of sacred weekly rest.

The word 'sabbatical' — a year off for renewal — extends the Sabbath concept to longer cycles. The ancient Hebrew rest echoes in every professor's sabbatical leave.