Clean up lots of models.

app/Models/PiggyBankEvent.php

@@ -23,6 +23,17 @@ use Illuminate\Database\Eloquent\Model;
 class PiggyBankEvent extends Model
 {
 
+    /**
+     * The attributes that should be casted to native types.
+     *
+     * @var array
+     */
+    protected $casts
+        = [
+            'created_at' => 'date',
+            'updated_at' => 'date',
+            'date'       => 'date',
+        ];
     protected $dates    = ['created_at', 'updated_at', 'date'];
     protected $fillable = ['piggy_bank_id', 'transaction_journal_id', 'date', 'amount'];
     protected $hidden   = ['amount_encrypted'];