use Carbon\Carbon; // Format a date in ISO-8601 format $date = Carbon::now(); echo $date->format('Y-m-d\TH:i:s'); // Format a date using a custom format string $date = Carbon::now(); echo $date->format('l jS \\of F Y h:i:s A'); // Format a date using a localized format string $date = Carbon::now(); echo $date->translatedFormat('l jS F Y h:i:s A');In the above examples, Carbon is used to format a date in various ways, including ISO-8601, a custom format string, and a localized format string. Carbon is part of the package library created by Brian Nesbitt that includes various PHP libraries designed to help developers in their PHP programming.