Fast of the Seventeenth of Tammuz (Shivah Asar B’Tammuz)
Jewish calendar sources place the fast on 17 Tammuz and document the postponement when that date falls on Shabbat; the Gregorian date is therefore recalculated from the Hebrew calendar each year.
Date and recurrence
17 Tammuz; postponed to 18 Tammuz when 17 Tammuz falls on Shabbat (2 July in 2026)
This observance follows a reusable calendar rule rather than one fixed Gregorian date. The actual date can move from year to year. Rule: 17 Tammuz in the Hebrew calendar; if 17 Tammuz falls on Shabbat, observe the fast on Sunday 18 Tammuz
Scope and status
The verified scope stored for this record is Judaism / minor fast marking the start of the Three Weeks. The site preserves that boundary and does not infer broader government, global or public-holiday status from the observance name alone.
Also known as
Fast of Shiva Asar B’Tammuz, Seventeenth of Tammuz
Topic and context
What this page does not assume
- Keep the source-defined country, community, organizer or institutional scope; do not silently broaden it.
- Do not treat the title alone as proof of government recognition or public-holiday status.
- Do not add a creator, founding story or origin claim unless the supporting evidence establishes it.
- Faith Context Respect.
Sources
- Chabad — Tammuz overviewJewish Calendar Authority
- Chabad — 17 Tammuz 5786 / July 2, 2026Jewish Calendar Authority
Frequently asked questions
When is Fast of the Seventeenth of Tammuz (Shivah Asar B’Tammuz)?
17 Tammuz; postponed to 18 Tammuz when 17 Tammuz falls on Shabbat (2 July in 2026) The stored recurrence guidance is: 17 Tammuz in the Hebrew calendar; if 17 Tammuz falls on Shabbat, observe the fast on Sunday 18 Tammuz.
Does Fast of the Seventeenth of Tammuz (Shivah Asar B’Tammuz) fall on the same date every year?
It follows a recurring calendar rule, so the Gregorian date can change from year to year.
Is Fast of the Seventeenth of Tammuz (Shivah Asar B’Tammuz) an official public holiday?
The authority record verifies it within this scope: Judaism / minor fast marking the start of the Three Weeks. That recognition does not by itself make it a statutory public holiday; the site only makes public-holiday claims when the supporting authority record explicitly does so.
Who established or recognizes Fast of the Seventeenth of Tammuz (Shivah Asar B’Tammuz)?
The stored designation basis is: Jewish calendar sources place the fast on 17 Tammuz and document the postponement when that date falls on Shabbat; the Gregorian date is therefore recalculated from the Hebrew calendar each year.. Supporting provenance includes Chabad — Tammuz overview. The site does not infer a separate creator or founder unless reviewed evidence establishes one.
Is Fast of the Seventeenth of Tammuz (Shivah Asar B’Tammuz) international or country-specific?
No single country is assigned to this record in the authority dataset. The source-defined scope is: Judaism / minor fast marking the start of the Three Weeks. Use that scope rather than assuming worldwide or country-specific status.
How is this page verified?
The factual layer is source-backed and keeps its date rule, scope, provenance and editorial guardrails attached to the authority record. This record was checked on 2026-09-09.