Class Carbon\Carbon not found

Question

I recently added a package to my Laravel 4 site and now anything that uses Eloquent (or at least Eloquent with any reference to date/time) is showing a 500 error that states

Answer 1

For all updated version you just need to

use Carbon\Carbon;

and for the global use, you can add this in app.php

'Carbon' => 'Carbon\Carbon',

Answer 2

My problem solved by just requiring nesbot/carbon just do this:

composer require nesbot/carbon