github.com/kelvins/sunrisesunset (go): Package sunrisesunset should be used to calculate the apparent sunrise and sunset based on the latitude, longitude, UTC offset and date. All calculations (formulas) were extracted from the Solar Calculation Details of the Earth System Research Laboratory: https://www.esrl.noaa.gov/gmd/grad/solcalc/calcdetails.html
Keywords: go|golang|sunrise|sunrise-equation|sunset