Every dataset behind this site, where it comes from and under which licence we use it.
| Data | Source | Licence |
|---|---|---|
| City names, coordinates, population | GeoNames (geonames.org), cities15000 | CC BY 4.0. Contains data from GeoNames. |
| ZIP code locations (ZIP search) | U.S. Census Bureau, ZIP Code Tabulation Area Gazetteer 2025; ZCTA-to-state and ZIP-to-ZCTA tables from the 2020 Census (via the us_geo project) | Public domain (U.S. Government work); us_geo tables MIT |
| Time zones | IANA Time Zone Database; boundaries from timezone-boundary-builder (resolved offline) | Public domain (tz); ODbL (boundaries) |
| Sun position formulas | U.S. Naval Observatory approximate solar coordinates; Meeus, Astronomical Algorithms | Published formulas |
| Calculation methods | ISNA, Muslim World League, Egyptian General Authority of Survey, University of Islamic Sciences Karachi, Umm al-Qura University (as tabulated by PrayTimes.org) | — |
| Hijri calendar | Umm al-Qura calendar via ICU (not available on this server) | — |
| Ramadan dates | Expected dates from the Umm al-Qura calendar, reviewed by the editors | — |
| Accuracy testing | adhan-js (independent implementation), used only at development time | MIT |
The site never fetches data from other services while you browse; all datasets are prepared offline and checked before import.
Mosque and restaurant listings may show an aggregate rating captured from Google Maps as plain text with its capture date. It is never used to rank listings or in structured data, and it is hidden after it becomes older than the configured age.