Installation

With Composer

Use the following command to install with composer.

composer require nesbot/carbon

This will automatically get the latest version and configure a composer.json file.

<?php
require 'vendor/autoload.php';

use Carbon\Carbon;

printf("Now: %s", Carbon::now());

If you wish you can create the following composer.json file and run composer install to install it.

{
    "require": {
        "nesbot/carbon": "^3.0"
    }
}

Direct

Why not using composer?

Download the last release (or any other you want) here: releases.

Release package is the asset named Carbon-x.y.z.zip where x.y.z is the version number.

Extract the zip in a directory in your project, then require the autoload.php file to make any Carbon class available:

<?php
require 'path/to/Carbon/autoload.php';

use Carbon\Carbon;
use Carbon\CarbonInterval;

printf("Now: %s", Carbon::now());

printf("1 day: %s", CarbonInterval::day()->forHumans());

Those packages contain symfony/translation to make diffForHumans method vailable in different languages.

Install with composer is still a better option since it allows you to get the symfony/translation (and possible future dependencies) version that suit the best your PHP version and keep the whole think up-to-date via composer update command.