Sunrise and Sunset

How to Use This API

1. Get Sun Times for Coordinates

https://api.sunrise-sunset.org/json?lat=36.7201600&lng=-4.4203400

Returns: sunrise, sunset, solar_noon, day_length, civil_twilight_begin, civil_twilight_end, nautical_twilight_begin, nautical_twilight_end, astronomical_twilight_begin, astronomical_twilight_end. All times UTC.

2. Specific Date

Add the date parameter (YYYY-MM-DD):

https://api.sunrise-sunset.org/json?lat=48.8566&lng=2.3522&date=2026-06-21

3. 24-Hour Format

Add formatted=0 for machine-readable ISO 8601 timestamps:

https://api.sunrise-sunset.org/json?lat=40.7128&lng=-74.0060&formatted=0

4. JavaScript — Golden Hour Calculator

async function getGoldenHour(lat, lng) {
  const resp = await fetch(
    `https://api.sunrise-sunset.org/json?lat=${lat}&lng=${lng}&formatted=0`
  );
  const data = await resp.json();
  const r = data.results;
  
  console.log(`Location: ${lat}, ${lng}`);
  console.log(`Sunrise: ${r.sunrise}`);
  console.log(`Sunset: ${r.sunset}`);
  console.log(`Day length: ${r.day_length}`);
  console.log(`Golden hour starts: ${r.civil_twilight_begin}`);
  console.log(`Golden hour ends: ${r.civil_twilight_end}`);
}

getGoldenHour(51.5074, -0.1278); // London

5. Python — Compare Day Lengths

import requests
from datetime import datetime

cities = [
    ('Reykjavik', 64.1466, -21.9426),
    ('London', 51.5074, -0.1278),
    ('Singapore', 1.3521, 103.8198),
]

for name, lat, lng in cities:
    resp = requests.get(
        'https://api.sunrise-sunset.org/json',
        params={'lat': lat, 'lng': lng, 'formatted': 0}
    )
    r = resp.json()['results']
    sr = r['sunrise'][11:16]
    ss = r['sunset'][11:16]
    print(f"{name}: Sunrise {sr}, Sunset {ss} ({r['day_length']}s)")