SunnyTracker

SunnyTracker is a free online resource for exploring sunlight, twilight, and astronomy information by city. It provides sunrise and sunset times in local time, automatically accounting for daylight saving time, along with day length and yearly daylight patterns. Visitors can view today’s figures for major cities worldwide and explore city pages with annual tables, monthly overviews, and daylight rankings.

The site also offers information and tools for understanding the sun throughout the day, including golden and blue hour times, a 3D sun globe, a solar photovoltaic calculator, shadow simulation, and city comparisons. Users can browse sunrise and sunset tables, moon phases, night-sky events, time zones, and sunset information for weddings and gardens or balconies. Its astronomy calendar highlights events such as full and new moons, meteor showers, eclipses, seasons, and clock changes.

SunnyTracker says its sunrise and sunset calculations use astronomical algorithms based on the NOAA Solar Calculator and are accurate to about a minute.