You can do this in two ways:
1 - Define the date indicated in the corresponding modelas,
public function getDates()
{
return array('created_at', 'updated_at', 'date_time_field');
}
then laravel returns the carbon object for these columns, so you can use like $time->year.
2- You can create a carbon object and get a year, as in Moppo's answer
Carbon::createFromFormat('Y-m-d H:i:s', $time)->year
, , .