Isru Chag

Scriptural and rabbinic roots

The name Isru Chag comes from Psalm 118, which speaks of binding a festive sacrifice with cords to the altar horns. In the Talmud, scholars teach that anyone who honors the conclusion of a sacred season with extra food and drink receives merit as if they built an altar and offered sacrifices. Later mystical teachings by Isaac Luria, cited by Yosef Hayyim, describe this custom as holding onto the lingering spiritual radiance of the departing holy day. By maintaining festive habits for one more day, believers carry that divine light into routine life.

Customs and prayer changes

Observance begins at nightfall right when the major festival concludes and continues throughout the next day. In many congregations, morning and afternoon services skip Tachanun, the traditional prayers of supplication, preserving a joyful tone in the synagogue. Authorities such as Moses Isserles noted that Ashkenazic households customarily prepare extra food and drink. Fasting is generally prohibited on this date under rulings recorded by Yisrael Meir Kagan, except when a community faces extreme collective trouble and declares a public fast.

Variations across traditions

While dropping supplication prayers is common across most Jewish groups, some traditions maintain different practices. The Dor Daim, a movement that developed in nineteenth-century Yemen based on the teachings of Maimonides, do not skip Tachanun on this occasion. According to Maimonides, supplications are set aside only during specific major holidays, the Sabbath, the New Moon, Purim, Hanukkah, and their preceding afternoons. Outside of such differences in liturgy, communities around the world share the core purpose of softening the transition from sacred festivals back to routine work.

How Isru Chag is kept

When the pilgrimage holiday ends at dusk, the observance of Isru Chag commences. Community members gather for regular synagogue services where the usual penitential prayers known as Tachanun are omitted from morning and afternoon liturgies. At home, families mark the occasion by serving slightly larger meals and enjoying extra drink, consciously avoiding any personal fasting unless a severe communal decree intervenes. The day concludes at nightfall, finishing the gradual return to daily affairs.

When and where

Isru Chag takes place three times every year, starting the evening immediately after Passover, Shavuot, and Sukkot end, and running until nightfall the following evening. Its exact calendar dates depend on when these three biblical pilgrimage holidays conclude.

This tradition is observed in Jewish communities across the world, including Israel and historical communities in Yemen. While universal across most congregations, specific liturgical details vary slightly between Ashkenazic groups and followers of Maimonides.

What Isru Chag means

The name translates to binding the festival, reflecting the idea of tying holiday sanctity into ordinary time. According to rabbinic and kabbalistic thought, lingering holiness remains after a sacred festival ends. By eating, drinking, and avoiding solemn supplications, worshippers absorb this remaining light and build a gentle bridge between sacred celebrations and regular daily life.

Days Isru Chag is marked

Questions people ask about Isru Chag

See also

PassoverA Jewish spring festival celebrating freedom from slavery with ritual mealsYom KippurThe holiest day in Judaism, dedicated to fasting, prayer and atonementSukkotA seven-day autumn Jewish festival of temporary booths, harvest prayers and hospitalityHoly SaturdayThe closing day of Holy Week, a Saturday of waiting, fasting and vigil before Easter

Good reading and sources

• Isru chag on WikipediaEncyclopedia
• Wikidata recordOpen data

It may contain mistakes. Traditions differ from one family, village and community to the next, and the people who keep them know them best. If something is wrong, tell us. Last refreshed 2026-10-06.