Sunlight (☀️)

Calculate dawn, dusk, golden and blue hour times by using various algorithms.

Twilight Types

• Civil Twilight
• Nautical Twilight
• Astronomical Twilight
• Dawn (official)
• Dusk (official)
• The Golden Hour
• The Blue Hour

Usage

Some examples:

import Sunlight

let sunlight = SunlightCalculator(latitude: 47.49801, longitude: 19.03991)
        
let officialDawn = sunlight.calculate(.dawn, twilight: .official)
let officialDusk = sunlight.calculate(.dusk, twilight: .official)

let civilDawn = sunlight.calculate(.dawn, twilight: .civil)
let civilDusk = sunlight.calculate(.dusk, twilight: .civil)

let astronomicalDawn = sunlight.calculate(.dawn, twilight: .astronomical)
let astronomicalDusk = sunlight.calculate(.dusk, twilight: .astronomical)

let nauticalDawn = sunlight.calculate(.dawn, twilight: .nautical)
let nauticalDusk = sunlight.calculate(.dusk, twilight: .nautical)

let blueHourStart = sunlight.calculate(.dawn, twilight: .custom(-8))
let blueHourEndGoldenHourStart = sunlight.calculate(.dusk, twilight: .custom(-4))
let goldenHourEnd = sunlight.calculate(.dusk, twilight: .custom(6))

Install

Just use the Swift Package Manager as usual:

.package(url: "https://github.com/binarybirds/sunlight", from: "1.0.0"),

⚠️ Don’t forget to add “Sunlight” to your target as a dependency!

License

WTFPL - Do what the fuck you want to.

Other sources

• https://en.wikipedia.org/wiki/Position_of_the_Sun

• https://en.wikipedia.org/wiki/Sunrise_equation

• https://www.codeproject.com/Articles/100174/Calculate-and-Draw-Moon-Phase

• http://lamminet.fi/jarmo/rscalc.cc

• https://www.timeanddate.com/astronomy/different-types-twilight.html

• https://www.photopills.com/articles/understanding-golden-hour-blue-hour-and-twilights