Guides
Understand the light you see.
Short, accurate explanations of the sky events Dayclipse calculates — what they are, why they change and what affects what you actually observe.
Golden Hour vs Blue Hour: Sun Angles, Timing and Light
What golden hour and blue hour are, the Sun angles that define them, why their length changes with season and latitude, and how to find them for your city.
Read the guide · 5 minCivil, Nautical and Astronomical Twilight Explained
The three stages of twilight, the Sun angles behind them, what you can see during each, and why some places never get fully dark in summer.
Read the guide · 5 minHow Sunrise and Sunset Times Are Calculated
Why sunrise is defined at −0.833°, how refraction and elevation shift what you see, why solar noon is rarely at 12:00, and why the earliest sunset isn't on the shortest day.
Read the guide · 6 minMoon Phases and Moonrise Times Explained
The eight phases of the Moon, how illumination and Moon age work, and why moonrise comes later each day — sometimes skipping a date entirely.
Read the guide · 5 min