Sunclock

Sunclock is a free web tool for planning around daylight. It shows sunrise and sunset, day length, and solar noon for a place and date you care about. You can also read the three twilight phases—civil, nautical, and astronomical—morning and evening, so you know when the sky is brightening, dimming, or settling toward night in astronomical terms.
Photographers often need more than a single sunset clock time. Sunclock includes golden hour and blue hour windows so you can compare warmer low sunlight with cooler twilight on the same day. That helps you judge whether a portrait, landscape, or city scene fits the light you want. Twilight here describes solar geometry, not a guarantee of bright paths, street lighting, or safe travel after dark. Real usable light still depends on clouds, haze, buildings, and how open the horizon is where you stand.
Outdoor plans share the same foundation. Sunrise and sunset mark when the Sun crosses a level horizon in the calculation; day length is the span between those events; solar noon marks the middle of the solar day. Because times assume a level horizon, hills, skylines, and elevation can change what you actually see outside. Treat the results as a clear planning baseline, then check local weather and the real terrain separately before you go.
Coverage includes example city pages for Las Vegas, New York, Chicago, San Diego, and Boston, plus place-and-date planning for golden hour and blue hour. Pick a location and a date, review that day’s light timetable, compare the photography windows you need, and save the schedule to a calendar so the plan sits with the rest of your reminders.
Sunclock stays focused on astronomical daylight timing rather than forecasts or maps. It does not replace a weather check, a site scout, or your own judgment about access after sunset. It gathers sunrise, sunset, day length, solar noon, three twilight phases, and golden and blue hour intervals in one free web place, so photography and outdoor planning can start from comparable light windows and finish with a calendar you can keep.