can not echo models date field...

Has somethign changed with accessing date fields of model? I believe the app was working fine but now echoing a date field "arrived_at" returns blank?

App\Booking Object
(
    [dates:protected] => Array
        (
            [0] => created_at
            [1] => updated_at
            [2] => arrived_at
            [3] => departured_at
        )

    [connection:protected] => 
    [table:protected] => 
    [primaryKey:protected] => id
    [perPage:protected] => 15
    [incrementing] => 1
    [timestamps] => 1
    [attributes:protected] => Array
        (
            [id] => 83
            [plot_id] => 1
            [arrived_at] => 2016-05-15
            [departured_at] => 2016-05-17
            [price] => 36
            [status] => reserved
            [created_at] => 2016-05-14 20:15:34
            [updated_at] => 2016-05-14 20:15:34
            [nights] => 2
            [deposit] => 30
        )

    [original:protected] => Array
        (
            [id] => 83
            [plot_id] => 1
            [arrived_at] => 2016-05-15
            [departured_at] => 2016-05-17
            [price] => 36
            [status] => reserved
            [created_at] => 2016-05-14 20:15:34
            [updated_at] => 2016-05-14 20:15:34
            [nights] => 2
            [deposit] => 30
        )