KosherJava Zmanim API
Business Profile
Core Value Proposition
KosherJava Zmanim API provides accurate zmanim calculations and supports in-flight integration with airline entertainment systems.
Target Customer
Software developers (especially Java) needing accurate Jewish time calculations; airlines and in-flight entertainment (IFE) providers; travel tech vendors integrating zmanim into apps and maps.
Key Differentiator
Open-source Zmanim library with multi-language ports (Java, JavaScript, .NET); supports real-time, location-based zmanim on moving platforms (airplanes); includes astronomical noon/midnight calculations and Parsha/Shabbat features; emphasizes up-to-date timezone data tooling and validation; active release history and community-driven development.
Implementation Timeline
Key releases and implementations include: Zmanim API 2.4.0 released November 27, 2022; Zmanim API 2.5.0 released June 9, 2023 (Java-based, Maven/GitHub); El Al in-flight Zmanim app deployed and live by February 2023; detailed El Al/Zmanim integration narrative published in 2023.
Pain Points
- 1Calculating zmanim accurately on moving platforms (aircraft) where location, speed, and time zones constantly change.
- 2Maintaining up-to-date timezone data (tz database) to prevent large errors in zmanim calculations across regions.
- 3Debugging and validating zmanim outputs in complex environments (e.g., in-flight apps) and integrating with third-party systems like FlightPath3D.
Key Features
- 1Zmanim API with support for chatzos, alos/hashachar, sunrise, etc., including dynamic calculations for moving locations.
- 2Astronomical noon and astronomical midnight calculations (enhanced precision in Arctic/Antarctic locations).
- 3Special calendar features: upcoming Parshah, Shabbasos/Parshiyos, Yom Kippur/Katan, and Tefila rules via TefilaRules.
- 4Upcoming Parshah retrieval and extended Jewish calendar capabilities.
- 5Open-source ports and releases (Java-based library; JavaScript port KosherZmanim; .NET framework) with Maven/GitHub distribution.
- 6In-flight integration use-case: real-time zmanim on flight maps powered by FlightPath3D and El Al in-flight systems.
Target Customer Industries
Decision Makers
- 1CEO, FlightPath3D
- 2Head of Inflight Entertainment & Connectivity (El Al)
Client Results
- 1Real-time zmanim displayed on El Al’s in-flight maps, calculated based on aircraft location and flight path with frequent recalculation (multiple times a minute).
- 2Countdown times to upcoming zmanim displayed within in-flight app context.
- 3Support for multiple international cities and bilingual English/Hebrew in the Zmanim experience.
- 4Integration with FlightPath3D and El Al’s in-flight entertainment ecosystem to deliver accurate zmanim without local device-only calculations.
Competitive Advantages
- 1Open-source licensing and community-driven development (LGPL tag indicates licensing context).
- 2Cross-language availability (Java library with JavaScript and .NET ports).
- 3Real-time, location-aware zmanim calculations for moving platforms (aircraft).
- 4In-depth calendar features (Parshiyot, Shabbos, tefila rules) beyond basic zmanim.
- 5Active maintenance and clear release history with feature enhancements (e.g., astronomical calculations, upcoming Parshah).
- 6Emphasis on up-to-date timezone data and guidance for tz database updates.
Key Benefits
Case Studies & Success Stories
El Al In-Flight Zmanim App powered by KosherJava
KosherJava’s Zmanim calculations power El Al’s in-flight zmanim within FlightPath3D’s flight maps. The app shows zmanim based on the aircraft’s current location, speed, and path, with countdowns to upcoming zmanim and a compass bearing to Jerusalem. It supports multiple cities, English/Hebrew UI, and includes a security-reviewed workflow for reporting issues. The integration involved collaboration with FlightPath3D and El Al’s IFE team, culminating in a live in-flight app (as of early 2023) and ongoing improvements.
Additional Product Information
Product Description
Open-source Java-based library for calculating Jewish time events (zmanim) with features for precise times, calendar calculations, and in-flight applicability. Includes ports and releases for JavaScript and .NET, and integrates with airline IFE systems via examples like El Al’s Zmanim app.
Target Market
Software developers building Jewish calendar/time calculations; organizations delivering in-flight entertainment or travel tech experiences; airlines and IFE vendors seeking accurate zmanim integrations.
Unique Value Proposition
Open-source, cross-language Zmanim solution with real-time flight-based calculations, comprehensive calendar features, and active maintenance, enabling airlines and developers to deliver accurate zmanim in dynamic environments.
Technical Requirements
Java-based library; distributed via Maven and GitHub; licensing indicated by LGPL tag; supports JavaScript port (KosherZmanim) and .NET port; relies on up-to-date tz database tooling for accuracy.
Pricing Model
Open Source; freely available for use and modification.
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