<div class="col-xs-3">
    <?= $form->field($model, 'fecha')->widget(
            DatePicker::classname(),
            [
                'language' => 'es',
                'removeButton' => false,
                'options' => [
                    'placeholder' => 'Fecha:',
                    'class' => 'form-control',
                    'id' => 'fecha_desde-input',
                    'onchange' => 'buscarProyeccion(this.value)'
                ],
                'pluginOptions' =>
                [
                    'startDate' => '01-01-2000',
                    //'startDate' => date('d-m-Y'),
                    'autoclose' => true,
                    'format' => 'dd-mm-yyyy',
                ]
            ]
            )->label('Fecha'); ?>

    </div>