Moon Sighting
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Moon Sighting

Islamic crescent moon visibility predictions powered by astronomical calculations and machine learning.

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Data Sources

  • JPL DE421 Ephemeris (NASA)
  • CrescentWatch.org observations
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  • Chicago Hilal Committee observations
  • Skyfield astronomical library

Methodology

  • 7 astronomical visibility parameters
  • ML Random Forest model
  • 2,000+ historical training records
Feedback & Feature Requests

Moon Sighting Project · Astronomical predictions are estimates and should be used alongside traditional moon sighting practices

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Moon Sighting in Algiers

North AfricaAfrica36.75°, 3.06°

28 Shawwal 1447 AH · Fri, Apr 17, 2026

Visibility Prediction
0/7 thresholds met
36.7538, 3.0588Fri, Apr 17, 2026·28 Shawwal 1447 AHAfrica/Algiers

Dhul Qi'dah 1447 AH

New Moon (Conjunction): 2026-04-17 11:51:48 UTC

PT: 04:51:48MT: 05:51:48CT: 06:51:48ET: 07:51:48
0%confidence
Not Possible

Sunset

19:23

Moonset

19:44

Astronomical Parameters

Moonset Lag20.9 min
Moon Age6.5 hrs
Moon Altitude2.9 °
Elongation4.7 °
Illumination0.1 %
ARCV3.8 °
Crescent Width0.1 ′
Upcoming Islamic Months in Algiers

Dhul Qi'dah 1447 AH

Sun, Apr 19, 2026

94% Very Likely

Dhul Hijjah 1447 AH

Mon, May 18, 2026

81% Very Likely

Muharram 1448 AH

Wed, Jun 17, 2026

98% Very Likely

Safar 1448 AH

Thu, Jul 16, 2026

85% Very Likely

Rabi al-Awwal 1448 AH

Sat, Aug 15, 2026

92% Very Likely

Rabi al-Thani 1448 AH

Mon, Sep 14, 2026

95% Very Likely

Moon Sighting in Africa

Africa's vast geography spans both hemispheres, creating diverse crescent moon sighting conditions. North African cities like Cairo, Casablanca, and Tunis share conditions similar to the Middle East, while East African cities like Nairobi sit near the equator where sighting conditions differ considerably.

With hundreds of millions of Muslims across the continent, accurate Hilal visibility predictions serve communities from Lagos to Johannesburg and from Dakar to Dar es Salaam. Each city's unique latitude and longitude significantly affect the timing and visibility of the new crescent.

How Our Predictions Work

Our system calculates five key astronomical parameters at sunset: moonset lag, moon age, moon altitude, sun-moon elongation, and illumination percentage. These are fed into a machine learning model trained on over 2,000 historical crescent sighting observations to produce a confidence score from 0% to 100%.

Moonset Lag

≥ 45 min

Moon Age

≥ 21 hrs

Altitude

≥ 8°

Elongation

≥ 10°

Illumination

≥ 0.9%

Upcoming Islamic Events in Algiers

Ramadan 2026

The holy month of fasting, prayer, and reflection observed by Muslims worldwide.

Eid al-Fitr 2026

The Festival of Breaking the Fast, celebrating the end of Ramadan.

Eid al-Adha 2026

The Festival of Sacrifice, the holiest of the two Islamic holidays, marking the culmination of Hajj.

Islamic New Year 2026

The first day of Muharram, marking the beginning of a new Islamic (Hijri) year.

Event dates for Algiers are based on local crescent moon visibility and may differ from other regions.

More Cities in Africa

Cairo

North Africa

Alexandria

North Africa

Casablanca

North Africa

Tunis

North Africa

Tripoli

North Africa

Lagos

West Africa

Abuja

West Africa

Dakar

West Africa