The Zionist writer Ahad Ha’am famously remarked that more than the Jewish people kept Shabbat, Shabbat has kept the Jewish people. There is a deep truth that is embedded in the organization of time, the ritualization of communal ceremonies of remembrance and praise, and the recapitulation of the traumas and triumphs of the past: that the calendar can function as a source of national solidarity. Living in rhythm with the Jewish calendar and all that entails is what makes Jews, Jews. The calendar is the instrument that the Jewish people developed to teach our children Jewish history and the fundamental principles of Judaism, and it is what sustains and reinforces those principles throughout the span of a person’s life. It serves, you might say, as a strategy for national cohesion. Jewish nationhood depends on the organization of Jewish hours, days, weeks, and months. In this episode of the Tikvah Podcast, Mosaic’s editor Jonathan Silver speaks with Rabbi Meir Soloveichik, who has just published a new book that interprets each of the Jewish holidays in light of how it contributes to Jewish national belonging. Rabbi Soloveichik leads Congregation Shearith Israel, the Spanish and Portuguese Synagogue; is the director of the Straus Center for Torah and Western Thought at Yeshiva University; and is the impresario of the website MeirSoloveichik.com, where you can find all of his writing along with his many video courses and podcasts, including his daily commentary on the Hebrew Bible, Bible365. His new book Sacred Time was published in 2024 by Koren.