Using the Calendarific API with JavaScript

If you’re looking for a simple and easy-to-use API for accessing holidays and observances, look no further than Calendarific! This API provides users with access to a comprehensive database of holidays, observances, and other important dates from around the world.

In this blog post, we’ll show you how to use the Calendarific API with JavaScript. We’ll walk you through all the necessary steps to get started, including how to generate an API key and how to make API requests using JavaScript.

Getting Started

To get started with the Calendarific API, the first thing you’ll need to do is sign up for a free API key. You can do this by visiting the Calendarific API website and creating an account.

Once you’ve signed up and confirmed your email address, you’ll be able to generate an API key. This API key will be the key to unlocking the full potential of the Calendarific API, so make sure to keep it safe!

Making an API Request

Now that you have your API key, it’s time to start making API requests. To make an API request, you’ll need to send a GET request to the Calendarific API URL with your API key and any other parameters you want to include.

Here’s an example of how to make an API request in JavaScript:

const api_key = 'YOUR_API_KEY';
const country = 'US';
const year = 2022;

const url = `${api_key}&country=${country}&year=${year}`;

    .then((res) => res.json())
    .then((data) => console.log(data));

In this example, we’re using the fetch method to send a GET request to the Calendarific API URL. We’re including our API key, as well as the country and year parameters, in the URL itself.

Once the API returns a response, we’re using the json method to parse the response data as JSON. Finally, we’re logging the data to the console to see what we’ve received.

Handling the API Response

When you make an API request to Calendarific, the API will return a JSON response that contains an array of holiday objects. Each holiday object will contain information about the holiday, including the holiday name, the date it occurs on, and any associated observances.

Here’s an example of what the response from an API request might look like:

    "meta": {
        "code": 200
    "response": {
        "holidays": [
                "name": "New Year's Day",
                "description": "New Year's Day celebrates the start of the calendar year.",
                "date": {
                    "iso": "2022-01-01",
                    "datetime": {
                        "year": 2022,
                        "month": 1,
                        "day": 1
                "type": ["National holiday"],
                "locations": "All",
                "states": "All",
                "observed": {
                    "iso": "2022-01-03",
                    "datetime": {
                        "year": 2022,
                        "month": 1,
                        "day": 3
            // ... more holiday objects

To access the holiday information in your JavaScript code, you can access the response object and the holidays array, like so:

// Assume the API response is saved in a 'data' variable
const holidays = data.response.holidays;

// Loop through the holiday objects and do something with them
holidays.forEach((holiday) => {

In this example, we’re looping through the holidays array and logging the holiday name and ISO date to the console for each holiday object.


That’s all it takes to get started with the Calendarific API in JavaScript! With just a few lines of code, you can access a wealth of holiday information and start building your own holiday-themed applications and websites.

Happy Holidays!