Data sources
The reviewed external references behind place, time, astronomy and weather information.
Source register reviewed: 15 July 2026
GeoNames
GeoNames cities15000 and country reference files supply place names, coordinates, population, administrative areas and time-zone identifiers under CC BY 4.0.
IANA Time Zone Database
IANA tzdb supplies canonical zone identifiers and civil UTC-offset rules. Runtime compatibility is checked before future changes are published.
Unicode CLDR
Unicode CLDR supplies reviewed English display names for countries, currencies and languages under the Unicode license.
US Naval Observatory
The USNO Astronomical Applications API supplies daily Sun and Moon events when the governed source integration is enabled and the requested date is supported.
Open-Meteo
Open-Meteo supplies modeled current, hourly and daily forecasts. The free endpoint is used only while the service has no advertising or subscriptions; a commercial customer endpoint and key are required before monetization.
Open-Meteo forecast documentation
WeatherAPI.com
WeatherAPI.com supplies current, hourly and daily forecast data through a server-side integration. Its free plan permits commercial and non-commercial use, includes a three-day forecast, and is credited on forecast pages.