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- Golden hour duration is typically advertised as 60 minutes but is actually shorter almost everywhere, never reaching an hour for the 27 cities studied.
- Golden hour length increases with distance from the equator: Singapore gets 24 minutes, while Berlin gets 39.6 minutes at the equinox.
- The shortest golden hour occurs at the equinox, and the longest at the winter solstice, with the seasonal swing increasing at higher latitudes; London ranges from 39 to 55 minutes.
- Near the equator, the sun sets vertically, causing a short golden hour (around 24 minutes) with minimal seasonal variation.
- At higher latitudes, the sun's shallow angle lengthens the golden hour, especially in winter; Berlin reaches 57.6 minutes in December.
- Golden hours exceeding 60 minutes require latitudes above roughly 60°N, such as Reykjavík or Anchorage.
- A dataset of 27 cities shows precise golden hour durations for equinox, June solstice, and December solstice, computed using the NOAA solar-position algorithm.