Astronomical calculations powered by NASA JPL ephemeris data and machine learning, trained on 2,000+ historical observations.
Search by US zip code or city name. Outside the US, tap My Location to use your current coordinates.
View predictions for 290+ cities across 12 regions worldwide
Upcoming Islamic month predictions for your location
Ramadan, Eid, and other key Islamic dates with Hilal predictions
Explore 2,000+ historical moon sighting observations
Our moon sighting predictions combine precise astronomical calculations with machine learning to determine when the crescent moon (Hilal) will be visible after a new moon conjunction. Using NASA JPL DE421 ephemeris data processed through the Skyfield library, we compute five key parameters at sunset for any location: moonset lag, moon age, moon altitude, sun-moon elongation, and lunar illumination percentage.
These parameters feed into a Random Forest model trained on over 2,000 historical sighting reports from CrescentWatch.org, MoonSighting.org.uk, and Chicago Hilal Committee spanning two decades. The model outputs a confidence percentage that maps to one of six visibility labels — from "Very Likely" to "Unlikely" — helping communities plan for the start of Islamic months like Ramadan, Shawwal, and Dhul Hijjah.
Predictions are available for any location worldwide. Enter a US zip code, or use the "My Location" button for automatic geolocation. We also provide pre-computed predictions for over 290 cities across 12 regions including the United States, Canada, Europe, the Middle East, Africa, Southeast Asia, the Indian Sub-Continent, the Americas, Central Asia, East Asia, and Oceania. Each prediction accounts for the observer's exact latitude, longitude, elevation, and local timezone.