Methodology
How calculations, forecasts and publication decisions are produced and checked.
Last reviewed: 15 July 2026
Local time and UTC offsets
Local times are calculated with the city’s canonical IANA time-zone identifier. The displayed date and offset are evaluated together for the requested instant, so half-hour and quarter-hour offsets are preserved.
Clock changes
Offset transitions are calculated across declared bounded periods. We describe verified offset changes without assuming their legal or daylight-saving purpose. Future transitions are withheld when the runtime does not cover the reviewed time-zone release.
Weather forecasts
Weather values are modeled forecasts for reviewed city coordinates, not station observations or safety warnings. The commercial provider selects a suitable model. Responses are validated, cached for a bounded period and withheld when their structure or location cannot be verified.
Nearby locations
Nearby cities are ranked using approximate great-circle distance between reviewed coordinates. Administrative relationships are preferred where available; distances are geographic estimates rather than road distances.
Initial capital-city cohort
The first search-publication cohort is limited to reviewed country and territory capitals. Each candidate must have a canonical place record, IANA time zone, country context, transition history, related-city links and versioned source disclosures. Other city routes remain useful to visitors but are excluded from search indexing until a later review.
Publication controls
Having a route does not automatically authorize indexing. Pages must pass content, provenance, canonical, structured-data and internal-link checks, and product indexing requires an explicit release gate.