Moon Sighting
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Moon Sighting

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

Top Cities

  • New York
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Data Sources

  • JPL DE421 Ephemeris (NASA)
  • CrescentWatch.org observations
  • MoonSighting.org.co.uk observations
  • 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 Chicago

United StatesUnited States41.88°, -87.63°

28 Dhul Hijjah 1447 AH · Mon, Jun 15, 2026

Visibility Prediction
7/7 thresholds met
41.8781, -87.6298Mon, Jun 15, 2026·28 Dhul Hijjah 1447 AHAmerica/Chicago

Muharram 1448 AH

New Moon (Conjunction): 2026-06-15 02:54:10 UTC

PT: Jun 14, 19:54:10MT: Jun 14, 20:54:10CT: Jun 14, 21:54:10ET: Jun 14, 22:54:10
70%confidence
Likely

Sunset

20:27

Moonset

21:42

Astronomical Parameters

Moonset Lag74.9 min
Moon Age22.6 hrs
Moon Altitude10.5 °
Elongation13.2 °
Illumination1.4 %
ARCV11.4 °
Crescent Width0.4 ′

United States Sighting Outlook

Crescent expected to be sighted in United States

Best chance: Jacksonville, FL (93% — Very Likely) on the evening of Mon, Jun 15, 2026

If sighted, 1st of Muharram 1448 AH begins Tue, Jun 16, 2026

Regional outlook based on the highest-confidence US city. Local observation still determines your zip code's sighting.

Upcoming Islamic Months in Chicago

Muharram 1448 AH

Tue, Jun 16, 2026

70% Likely

Safar 1448 AH

Thu, Jul 16, 2026

89% Very Likely

Rabi al-Awwal 1448 AH

Sat, Aug 15, 2026

93% Very Likely

Rabi al-Thani 1448 AH

Mon, Sep 14, 2026

96% Very Likely

Jumada al-Ula 1448 AH

Tue, Oct 13, 2026

29% Difficult

Jumada al-Thani 1448 AH

Thu, Nov 12, 2026

86% Very Likely

Moon Sighting in the United States

The United States spans multiple time zones, creating varied crescent moon sighting conditions from coast to coast. Western cities like San Francisco and Los Angeles typically benefit from later sunset times relative to moonset, while eastern cities like New York and Miami may experience shorter moonset lag times.

Muslim communities across America rely on accurate Hilal visibility predictions to determine the start of Islamic months, particularly for Ramadan, Shawwal (Eid al-Fitr), and Dhul Hijjah (Eid al-Adha). Our predictions combine NASA JPL ephemeris data with machine learning trained on over 2,000 historical observations.

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 Chicago

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 Chicago are based on local crescent moon visibility and may differ from other regions.

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