Moon Visibility Explorer

Calculate Lunar Calendar & Hijri Dates Using Odeh V-Criterion

Generate accurate lunar calendars and Hijri dates with moon sighting predictions for 70+ cities worldwide.
This tool uses the Odeh V-criterion to visualize crescent visibility on a global map.

Contact Us

تواصل معنا — نرحب بملاحظاتكم واستفساراتكم

Get in Touch

We welcome feedback, questions, bug reports, feature requests, and collaboration inquiries from all users. Whether you are an individual curious about the Islamic calendar, an astronomer working on lunar crescent observation, a representative of a moon sighting committee, or an Islamic organization looking to integrate crescent visibility data into your workflow, we would love to hear from you.

Moon Visibility Explorer is a community-driven project, and your input directly shapes the tool's future development. Past community feedback has led to the addition of shared night analysis, PDF export functionality, and expanded city coverage.

📧 Email Us

The best way to reach us is by email. We aim to respond to all inquiries within 48 hours.

moonvisapp@gmail.com

What Can We Help With?

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Bug Reports

Found something not working correctly? A calculation that looks wrong? A page that doesn't load? Let us know the details and we'll investigate.

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Feature Requests

Want to see a new city added, a different visibility criterion, or a new export format? We prioritize features based on community demand.

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Scientific Inquiries

Questions about the Odeh V-criterion, our astronomical algorithms, or how we handle edge cases? We're happy to discuss the technical details.

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Collaboration

Represent a moon sighting committee, observatory, or Islamic organization? We're open to partnerships and data-sharing agreements.

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City Requests

Your city not in our database? Send us the city name, country, and approximate coordinates, and we'll add it to a future update.

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Media & Press

Journalist or blogger writing about Islamic astronomy or calendar technology? We're available for interviews and can provide technical background.

Frequently Asked Questions Before Contacting

Before reaching out, you may find your answer in our existing resources:

  • FAQ page — Answers to the most common questions about the Islamic calendar, the Odeh criterion, shared night, and how to use the tool.
  • User Guide — Step-by-step instructions for using the visibility map, generating calendars, and exporting data.
  • Methodology page — Detailed technical documentation about our astronomical algorithms and visibility models.
  • About page — Background on the project, its mission, and the technology stack.

نرحب بجميع الملاحظات والأسئلة والاقتراحات وطلبات التعاون. سواء كنتم أفراداً أو تمثلون لجنة رؤية الهلال أو مؤسسة إسلامية أو مرصداً فلكياً، يسعدنا التواصل معكم. يمكنكم مراسلتنا على البريد الإلكتروني أعلاه وسنرد في أقرب وقت ممكن.

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