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
  • 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 Philadelphia

United StatesUnited States39.95°, -75.17°

28 Rabi al-Awwal 1448 AH · Fri, Sep 11, 2026

North America Sighting Outlook

Crescent expected to be sighted in North America

Best chance: Orlando, FL (67% — Likely) on the evening of Sat, Sep 12, 2026

If sighted, 1st of Rabi al-Thani 1448 AH begins Sun, Sep 13, 2026

Regional outlook based on the highest-confidence North American city (US or Canada). Local observation still determines your area's sighting.

Visibility Prediction
1/7 thresholds met
39.9526, -75.1652Fri, Sep 11, 2026·28 Rabi al-Awwal 1448 AHAmerica/New_York

Rabi al-Thani 1448 AH

New Moon (Conjunction): 2026-09-11 03:26:59 UTC

PT: Sep 10, 20:26:59MT: Sep 10, 21:26:59CT: Sep 10, 22:26:59ET: Sep 10, 23:26:59
1%confidence
Unlikely

Sunset

19:15

Moonset

19:23

Astronomical Parameters

Moonset Lag7.3 min
Moon Age19.8 hrs
Moon Altitude0.6 °
Elongation10.6 °
Illumination0.8 %
ARCV1.4 °
Crescent Width0.3 ′

Where it's most likely to be seen

Places with a higher chance of sighting the crescent on this date:

  • 1San Diego, CA20% — Very Difficult
  • 2Miami, FL19% — Very Difficult
  • 3Orlando, FL19% — Very Difficult
Upcoming Islamic Months in Philadelphia

Rabi al-Thani 1448 AH

Mon, Sep 14, 2026

96% Very Likely

Jumada al-Ula 1448 AH

Tue, Oct 13, 2026

32% Difficult

Jumada al-Thani 1448 AH

Thu, Nov 12, 2026

88% Very Likely

Rajab 1448 AH

Fri, Dec 11, 2026

68% Likely

Sha'ban 1448 AH

Sun, Jan 10, 2027

95% Very Likely

Ramadan 1448 AH

Mon, Feb 8, 2027

80% 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 Philadelphia

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

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