yii2 Date validation is not working -

in model have start , end date , need compare start , end dates.i added validation rules format , custom validation rules compare

        [['start_date','end_date'], 'date', 'format' => 'yyyy-m-d'],         ['start_date','validatedates'],       public function validatedates(){        if(strtotime($this->end_date) <= strtotime($this->start_date)){         $this->adderror('start_date','please give correct start , end dates');         $this->adderror('end_date','please give correct start , end dates');        }      } 

i tried format validation

   [['start_date','end_date'], 'date', 'format' => 'php:y-m-d'], 

in view file customized start , end date design

                    <?= $form->field($quote, 'start_date',['template' => '{label}{input}<p class="help-block help-block-error">{hint}</p><div class="dtbox"></div>'])->textinput(['data-field' => 'date'])->label("arrival date", [                                 'class' => 'control-label quote-layout-text',                         ]); ?>                       <?= $form->field($quote, 'end_date',['template' => '{label}{input}<p class="help-block help-block-error">{hint}</p><div class="dtbox"></div>'])->textinput(['data-field' => 'date'])->label("departure date", [                                 'class' => 'control-label quote-layout-text',                         ]); ?> 

i added start , end date validation required validation messages required fields.but didn't validation messages format , compare.

it seems don't have {error} tag in fields template. try add it.