# Hebrew / Jewish Calendar Bilingual Date Converter Converts any date between Gregorian, Julian and the fixed Hebrew calendar: molad of the month, the four dehiyyot postponement judgments, keviyah year type, the weekly Torah portion (parasha) for Israel or Diaspora, the Omer count, the full festival schedule of the Hebrew year and the Anno Mundi era in Hebrew letters. > Canonical page: https://elysiatools.com/en/tools/hebrew-calendar-bilingual-date-converter - **Category:** Date & Time - **Keywords:** hebrew calendar, jewish calendar, hebrew date converter, anno mundi, molad, dehiyyot, postponement rules, rosh hashanah date, keviyah, parasha, torah portion, parashat hashavua, omer count, sefirat haomer, nisan, tishrei, metonic cycle, julian calendar conversion, bilingual date, hebcal alternative ## Overview Enter a date as Gregorian ("2026-04-11"), Julian ("1712-01-30" with the Julian calendar selected) or Hebrew ("15 Nisan 5786" or "5786-7-15" with religious month numbering, 1 = Nisan). The engine implements the classical fixed calendar: the mean molad (29d 12h 793 halakim) from the BaHaRaD epoch, the four dehiyyot (Molad Zaken, Lo ADU Rosh, GaTaRaD, BeTU-TaKPaT), the 19-year Metonic cycle with leap years 3/6/8/11/14/17/19, and the 14 keviyot year types that drive the 54-portion Torah reading cycle — including the canonical combined portions and the Israel/Diaspora difference (an extra festival Shabbat in the Diaspora). Outputs: bilingual Hebrew/English date with gematriya year, molad time, which postponement rules fired, keviyah in Hebrew letters, this and next week’s parasha, the Omer day when in season, and every major festival of that Hebrew year with Gregorian dates (each Jewish day starts the evening before). Candle-lighting times require a location and are out of scope. ## Inputs - **Input calendar** (select) - **Date to convert** (text): Gregorian: 2026-04-11 or April 11 2026 · Hebrew: 15 Nisan 5786 or 5786-7-15 · Julian: 1712-01-30 - **Torah reading schedule** (select) ## When to use - Converting civil dates into accurate Hebrew calendar dates with Anno Mundi gematriya for legal documents or lifecycle events. - Checking the weekly Torah reading (Parashat HaShavua) and Omer count for a specific Shabbat in Israel or the Diaspora. - Analyzing historical or halachic calendar calculations, including molad times, keviyah types, and Rosh Hashanah postponement rules (dehiyyot). ## How it works - Select the input calendar format (Gregorian, Hebrew, or Julian) and provide the target date in standard numeric or text form. - Choose the Torah reading schedule region (Israel for 1-day festivals or Diaspora for 2-day festivals). - The engine applies the fixed Metonic cycle from the BaHaRaD epoch, calculates the mean molad, evaluates the four dehiyyot postponement rules, and derives the 14-keviyah year configuration. - Review the resulting bilingual date card, halachic postponement breakdowns, weekly parasha listings, Omer day (when in season), and complete annual holiday schedule. ## Use cases - Synagogue administrators scheduling annual reading portions and holiday dates for liturgical planning across diaspora and Israeli communities. - Historians and genealogists reconciling historical Julian or Gregorian dates with traditional Hebrew records and ketubot. - Students and educators analyzing mathematical principles of the fixed calendar, including molad halakim, Metonic leap cycles, and postponement rules. ## Frequently asked questions ### How does the converter handle Jewish day boundaries? Each Hebrew calendar day begins at sundown on the preceding civil evening. The tool displays the primary civil date corresponding to the Hebrew daytime portion. ### What are the four dehiyyot postponement rules shown in the output? The dehiyyot are halachic postponement rules (Molad Zaken, Lo ADU Rosh, GaTaRaD, and BeTU-TaKPaT) used to set Rosh Hashanah while preventing Yom Kippur from falling adjacent to Shabbat and Hoshanah Rabbah on Shabbat. ### Why do the Torah portions differ between Israel and the Diaspora? In the Diaspora, an extra day is observed for major festivals, which can turn a regular Shabbat into a festival reading and temporarily offset the weekly parasha cycle until combined portions realign the schedules. ### How are Hebrew months numbered when using numeric input? Numeric Hebrew input follows the religious calendar sequence starting in Nisan (Month 1 = Nisan, Month 7 = Tishrei). ### Does this tool calculate local candle-lighting and zmanim times? No. Local zmanim and candle-lighting calculations require geographic coordinates and local elevation, which are outside the scope of this calendar engine. ## Related tools - [CSV Flavor to SQL INSERT Emitter](https://elysiatools.com/en/tools/csv-flavor-to-sql-insert-emitter): Parse CSV/Excel-CSV/TSV (auto dialect, RFC 4180) into MySQL/PostgreSQL/SQLite/SQL Server INSERT batches with type inference and ON CONFLICT/IGNORE - [H3 and S2 Hexagonal Cell Index Encoder and Neighbor Bridge](https://elysiatools.com/en/tools/h3-and-s2-hexagonal-cell-index-encoder-and-neighbor-bridge): Encode lat/lng into Uber H3 hexagons (res 0-15) and Google S2 Hilbert cells (level 1-30) with index, id, token, quadkey, areas, k-ring neighbors, compaction, parent ladders and round-trip drift. - [Hash Algorithm Comparator](https://elysiatools.com/en/tools/hash-algorithm-comparator): Hash the same input with MD5, SHA-1, SHA-256, SHA-512, BLAKE2b, and BLAKE3 at the same time and compare them side by side: output length, hex/Base64 digest, security status (broken / modern), and a relative speed benchmark. Great for teaching, choosing a hashing algorithm, or sanity-checking checksums. - [RSA Encrypt / Decrypt](https://elysiatools.com/en/tools/rsa-encrypt-decrypt): Encrypt text with an RSA public key or decrypt ciphertext with the matching private key, using OAEP padding (SHA-1 or SHA-256). Handles long messages by chunking. Keys and data stay local. PKCS#1 v1.5 is intentionally not offered (Node disables it for decryption due to Bleichenbacher attacks). - [Web Push RFC 8030 Request + VAPID + RFC 8291 Payload Encryption Encoder](https://elysiatools.com/en/tools/web-push-rfc8030-vapid-rfc8291-payload-encrypted-content-encoder): Encode a complete Web Push send: RFC 8291 aes128gcm payload encryption, RFC 8292 VAPID ES256 JWT, RFC 8030 headers, APNs/FCM cross-walk and decrypt round-trip verification. - [HCL-JSON Converter](https://elysiatools.com/en/tools/hcl-json-converter): Convert between HashiCorp Configuration Language (HCL) and JSON formats for Terraform configurations - [HCL-TOML Converter](https://elysiatools.com/en/tools/hcl-toml-converter): Convert between HashiCorp Configuration Language (HCL) and TOML formats for infrastructure configurations - [HCL-YAML Converter](https://elysiatools.com/en/tools/hcl-yaml-converter): Convert between HashiCorp Configuration Language (HCL) and YAML formats for Terraform configurations ## Samples - [ICS Calendar Samples](https://elysiatools.com/en/samples/ics-samples): Sample iCalendar (.ics) files for testing calendar import, event parsing, reminders, and recurring schedules - [Web Image Processing Python Samples](https://elysiatools.com/en/samples/web-image-processing-python): Web Python image processing examples using PIL/Pillow including reading, saving, resizing, and format conversion - [Android Date & Time Java Samples](https://elysiatools.com/en/samples/android-datetime-java): Android Java date and time examples including getting current time, formatting dates, and parsing date strings - [Android Date & Time Kotlin Samples](https://elysiatools.com/en/samples/android-datetime-kotlin): Android Kotlin date and time examples including getting current time, formatting dates, and parsing date strings