new Carbon($coupon->expire_date) code example

Example 1: carbon date from format

Carbon::createFromFormat('Y-m-d H:i:s', $request->date)->format('d-m-Y')

Example 2: get array of last 3 dates with carbon

$period = CarbonPeriod::create('2018-06-14', '2018-06-20');

// Iterate over the period
foreach ($period as $date) {
    echo $date->format('Y-m-d');
}

// Convert the period to an array of dates
$dates = $period->toArray();