• It can use some extended format on Carbon::format method

Using the composer to install this package

composer require lee/carbon-extended:^1.0

• The CarbonExtended class extends Carbon and it can use createFromFormat to create the Carbon class instance and do format with extended foramts.

use Lee\CarbonExtended;

$date = '2013-03-17';
$customizedFormat = 'QTR.';

$carbonExtended = CarbonExtended::createFromFormat('Y-m-d', $date);
$result = $carbonExtended->extendedFormat($customizedFormat); // 1

• The customized format name is refer on SAS date format
• Here are available extended formats: (it will have more customized formats...)

SAS date documentation