Worldwide city search
Search currently covers 69,691 cities and administrative seats across 245 country and territory codes from the GeoNames cities5000 extract, snapshot 2026-09-03. GeoNames permits commercial use under the Creative Commons Attribution 4.0 International license. TimePassport modifies the source extract by selecting relevant fields, removing unsafe control characters, compacting records, and ranking results. Source: GeoNames.
World map
Country outlines come from the World Atlas package under the ISC license. World Atlas derives its boundaries from Natural Earth, whose map data is in the public domain. TimePassport supplies its own colors, daylight layer, clock markers, interaction, and interface.
Time-zone rules
Time calculations use standard IANA time-zone identifiers and the time-zone rules available in the visitor’s browser or operating system. The IANA Time Zone Database is public-domain data and is updated when governments change civil-time rules.
Icons, software, and notices
Interface icons are provided by Lucide under the ISC license. TimePassport also uses permissively licensed open-source software. Required notices and license text are retained in the project and published in the third-party notices.
Visual artwork
The rotating Earth background is adapted from NASA’s Scientific Visualization Studio, “Spinning Earth with clouds, atmosphere, and night lights.” SVS makes this visualization available in the public domain. TimePassport resizes, compresses, slows and loops the silent animation. This use does not imply NASA endorsement. The animation is decorative, not a live satellite feed or a representation of the current day/night boundary.
The TimeTravel scenes and TimePassport brand mark were created specifically for this project; they were not downloaded from Google Earth, a stock-photo catalog, or another clock website. The TimeTravel scenes are AI-assisted compositions. No third-party logos or watermarks are intentionally included.