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.

Moon Sighting in Cairo, Egypt

Real-time moon visibility and lunar calendar predictions for Cairo, Egypt, powered by the Odeh V-criterion.

Calculating visibility...

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Moon Visibility in Cairo, Egypt

Track the current and future moon phases for Cairo, Egypt (Coordinates: 30.00°N, 31.20°E). The moon visibility forecast for Cairo, Egypt tonight indicates that the crescent falls into the "Easily Visible" zone, with a current lunar illumination of an unknown.

Our tool provides highly accurate crescent visibility predictions using the Odeh V-criterion algorithms framework, helping you determine the formal start of lunar months in Cairo and the surrounding regional territories. All calculations are performed in real-time using the precise positions of the Sun and Moon via the astronomy-engine library.

Astronomical Data for Cairo

Located in the Africa/Cairo timezone, Cairo interacts with the lunar cycle in a unique way based on its specific geographical position on the globe at latitude 30.00° and longitude 31.20°. Factors such as standard atmospheric twilight conditions, topocentric altitude, the moon's elongation from the sun, and the crescent width are actively computed for each query. The interactive map above shows the precise visibility zones affecting Cairo and the surrounding region.

Moon Sighting Traditions in Egypt

Egypt follows the decision of Dar al-Ifta al-Misriyya for determining the start of Islamic months. The Grand Mufti of Egypt typically announces the sighting based on a combination of astronomical calculation and physical observation from the Qattamia Observatory.

تتبع مصر قرار دار الإفتاء المصرية لتحديد بداية الأشهر الإسلامية.

Climate & Sighting Conditions

Clear desert skies in inland Egypt provide good sighting conditions, though the Nile Delta region can experience more humidity that impacts horizon visibility.

Using the Tool for Cairo

To generate a complete Hijri lunar calendar for Cairo, return to the home page, select "Cairo, Egypt" from the city dropdown, choose your reference date, and click "Calculate Lunar Calendar." The tool will predict the start of each of the next 12 Islamic months, accounting for both direct visibility and shared night inheritance from nearby regions.

You can also export your calendar as a PDF for community distribution, add events to Google Calendar, or download the raw data as a CSV file. Visit our User Guide for detailed step-by-step instructions, or check the FAQ for answers to common questions about lunar calendar calculations.

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