Daylight Duration Calculator

Overview

Returns detailed information including day of year, sunrise/sunset times, and formatted daylight duration, perfect for solar energy, agriculture, and travel applications.

Endpoint

One host, one path per API. The block below shows this call in four languages; every one of them is the same HTTP request. Making requests covers the timeouts, retries and parameter rules that apply to all of them. The SDKs wrap the same call in a typed client.

curl "https://api.apiverve.com/v1/daylightduration?latitude=40.7128&longitude=-74.006&date=2024-06-21" \
  -H "x-api-key: your_api_key_here"

const res = await fetch('https://api.apiverve.com/v1/daylightduration?latitude=40.7128&longitude=-74.006&date=2024-06-21', {
  headers: { 'x-api-key': 'your_api_key_here' },
});

if (!res.ok) throw new Error(`${res.status} ${await res.text()}`);

const { data } = await res.json();
console.log(data);

import requests

res = requests.get(
    "https://api.apiverve.com/v1/daylightduration?latitude=40.7128&longitude=-74.006&date=2024-06-21",
    headers={"x-api-key": "your_api_key_here"},
    timeout=15,
)
res.raise_for_status()

print(res.json()["data"])

package main

import (
	"fmt"
	"io"
	"net/http"
)

func main() {
	req, _ := http.NewRequest("GET", "https://api.apiverve.com/v1/daylightduration?latitude=40.7128&longitude=-74.006&date=2024-06-21", nil)
	req.Header.Set("x-api-key", "your_api_key_here")

	res, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	defer res.Body.Close()

	out, _ := io.ReadAll(res.Body)
	fmt.Println(string(out))
}

Replace your_api_key_here with the key from your dashboard. When the inputs arrive as a list rather than one at a time, batch requests run up to 200 of them through this same API in a single call.

Authentication

Send your key in the x-api-key header. That is the only auth step — there is no token exchange and no per-endpoint scope to configure. Authentication covers creating, rotating and revoking keys.

Parameters

Sent in the query string. Premium parameters are accepted on every plan but only take effect on plans that include them.

Response

Every API returns the same three top-level keys, so one response handler covers your whole integration: status, error and data. Only data changes shape. Response format covers the envelope, the other output formats and how premium fields are withheld.

{
  "status": "ok",
  "error": null,
  "data": {
    "date": "2024-06-21",
    "location": {
      "latitude": 40.7128,
      "longitude": -74.006
    },
    "condition": "Normal",
    "description": "Standard sunrise and sunset",
    "sunrise": "09:25:09",
    "sunset": "24:30:44",
    "daylight_duration": {
      "total_minutes": 905.58,
      "hours": 15,
      "minutes": 5,
      "formatted": "15:05:00"
    },
    "day_of_year": 173,
    "is_valid": true
  }
}

Response fields

Paths are relative to data. Premium fields are absent rather than zeroed on plans that do not include them, so check for presence instead of comparing to 0.

Errors

Read the HTTP status first, then error for the specific reason. The body names the parameter that has to change. Error handling covers the full status list and which of them are worth retrying.

Use cases

Solar Optimization

Calculate daylight hours for solar panel optimization and energy production forecasting based on geographic location

Activity Planning

Plan outdoor activities and events based on accurate sunset and sunrise times for any location and date

Weather Apps

Build weather and astronomy applications with precise daylight duration calculations and solar position data

Photography Scheduling

Schedule photography sessions based on golden hour timing, blue hour, and optimal natural lighting conditions

Other ways to use Daylight Duration Calculator

Set up Daylight Duration Calculator on APIVerve, or reach the same source a different way. Your APIVerve account and credits work on all of them — one key, one balance.

Related

More in Math/Calculations: