diff --git a/dist/simple-form.bootstrap4.esm.js b/dist/simple-form.bootstrap4.esm.js
index 5ab3ec9..4b28055 100644
--- a/dist/simple-form.bootstrap4.esm.js
+++ b/dist/simple-form.bootstrap4.esm.js
@@ -23,6 +23,7 @@ ClientSideValidations.formBuilders['SimpleForm::FormBuilder'] = {
   wrappers: {
     "default": {
       add: function add(element, settings, message) {
+        alert('bla');
         var wrapperElement = element.parent();
         var errorElement = wrapperElement.find(settings.error_tag + '.invalid-feedback');
 
diff --git a/dist/simple-form.bootstrap4.js b/dist/simple-form.bootstrap4.js
index 431ad3c..feaf840 100644
--- a/dist/simple-form.bootstrap4.js
+++ b/dist/simple-form.bootstrap4.js
@@ -29,6 +29,7 @@
     wrappers: {
       "default": {
         add: function add(element, settings, message) {
+          alert('bla');
           var wrapperElement = element.parent();
           var errorElement = wrapperElement.find(settings.error_tag + '.invalid-feedback');
 
diff --git a/dist/simple-form.esm.js b/dist/simple-form.esm.js
index 79ee074..8a1365d 100644
--- a/dist/simple-form.esm.js
+++ b/dist/simple-form.esm.js
@@ -23,6 +23,12 @@ ClientSideValidations.formBuilders['SimpleForm::FormBuilder'] = {
   wrappers: {
     "default": {
       add: function add(element, settings, message) {
+        console.log(this);
+
+        if (element.is('select') && (element.hasClass('date') || element.hasClass('time'))) {
+          console.log(this);
+        }
+
         var wrapper = element.closest(settings.wrapper_tag + '.' + settings.wrapper_class.replace(/ /g, '.'));
         var errorElement = wrapper.find(settings.error_tag + '.' + settings.error_class.replace(/ /g, '.'));
 
@@ -44,15 +50,6 @@ ClientSideValidations.formBuilders['SimpleForm::FormBuilder'] = {
         return errorElement.remove();
       }
     },
-
-    get horizontal_multi_select() {
-      return this.multi_select;
-    },
-
-    get vertical_multi_select() {
-      return this.multi_select;
-    },
-
     multi_select: {
       add: function add(element, settings, message) {
         var wrapperElement = element.closest(settings.wrapper_tag + '.' + settings.wrapper_class.replace(/ /g, '.'));
diff --git a/dist/simple-form.js b/dist/simple-form.js
index 980273e..42ad6b1 100644
--- a/dist/simple-form.js
+++ b/dist/simple-form.js
@@ -29,6 +29,12 @@
     wrappers: {
       "default": {
         add: function add(element, settings, message) {
+          console.log(this);
+
+          if (element.is('select') && (element.hasClass('date') || element.hasClass('time'))) {
+            console.log(this);
+          }
+
           var wrapper = element.closest(settings.wrapper_tag + '.' + settings.wrapper_class.replace(/ /g, '.'));
           var errorElement = wrapper.find(settings.error_tag + '.' + settings.error_class.replace(/ /g, '.'));
 
@@ -50,15 +56,6 @@
           return errorElement.remove();
         }
       },
-
-      get horizontal_multi_select() {
-        return this.multi_select;
-      },
-
-      get vertical_multi_select() {
-        return this.multi_select;
-      },
-
       multi_select: {
         add: function add(element, settings, message) {
           var wrapperElement = element.closest(settings.wrapper_tag + '.' + settings.wrapper_class.replace(/ /g, '.'));
diff --git a/src/main.js b/src/main.js
index 832f12e..8249555 100644
--- a/src/main.js
+++ b/src/main.js
@@ -18,6 +18,10 @@ ClientSideValidations.formBuilders['SimpleForm::FormBuilder'] = {
   wrappers: {
     default: {
       add (element, settings, message) {
+       if (element.is('select') && (element.hasClass('date') || element.hasClass('time'))) {
+          console.log(this.wrappers.multi_select.add(element, settings, message))
+        }
+
         const wrapper = element.closest(settings.wrapper_tag + '.' + settings.wrapper_class.replace(/ /g, '.'))
         var errorElement = wrapper.find(settings.error_tag + '.' + settings.error_class.replace(/ /g, '.'))
 
@@ -38,12 +42,6 @@ ClientSideValidations.formBuilders['SimpleForm::FormBuilder'] = {
         return errorElement.remove()
       }
     },
-    get horizontal_multi_select () {
-      return this.multi_select
-    },
-    get vertical_multi_select () {
-      return this.multi_select
-    },
     multi_select: {
       add (element, settings, message) {
         const wrapperElement = element.closest(settings.wrapper_tag + '.' + settings.wrapper_class.replace(/ /g, '.'))
diff --git a/test/javascript/public/test/form_builders/validateSimpleForm.js b/test/javascript/public/test/form_builders/validateSimpleForm.js
index 3643175..4a324c8 100644
--- a/test/javascript/public/test/form_builders/validateSimpleForm.js
+++ b/test/javascript/public/test/form_builders/validateSimpleForm.js
@@ -12,7 +12,7 @@ QUnit.module('Validate SimpleForm', {
     dataCsv = {
       html_settings: {
         type: 'SimpleForm::FormBuilder',
-        error_class: 'error small',
+        error_class: 'error',
         error_tag: 'span',
         wrapper_error_class: 'field_with_errors',
         wrapper_tag: 'div',
diff --git a/test/javascript/public/test/form_builders/validateSimpleFormBootstrap4Datetime.js b/test/javascript/public/test/form_builders/validateSimpleFormBootstrap4Datetime.js
new file mode 100644
index 0000000..29b8cfa
--- /dev/null
+++ b/test/javascript/public/test/form_builders/validateSimpleFormBootstrap4Datetime.js
@@ -0,0 +1,170 @@
+QUnit.module('Validate SimpleForm Bootstrap 4 Datetime Fields/Wrappers', {
+  before: function () {
+    currentFormBuilder = window.ClientSideValidations.formBuilders['SimpleForm::FormBuilder']
+    window.ClientSideValidations.formBuilders['SimpleForm::FormBuilder'] = BS4_FORM_BUILDER
+  },
+
+  after: function () {
+    window.ClientSideValidations.formBuilders['SimpleForm::FormBuilder'] = currentFormBuilder
+  },
+
+  beforeEach: function () {
+    dataCsv = {
+      html_settings: {
+        type: 'SimpleForm::FormBuilder',
+        error_class: null,
+        error_tag: 'div',
+        wrapper_error_class: 'form-group-invalid',
+        wrapper_tag: 'div',
+        wrapper_class: 'form-group'
+      },
+      validators: {
+        'user[date_of_birth]': { presence: [{ message: 'must be present' }] },
+        'user[time_of_birth]': { presence: [{ message: 'must be present' }] }
+      }
+    }
+
+    $('#qunit-fixture')
+      .append(
+        $('<form>', {
+          action: '/users',
+          'data-client-side-validations': JSON.stringify(dataCsv),
+          method: 'post',
+          id: 'new_user'
+        })
+          .append($('<div>', {
+            class:'form-group date required user_date_of_birth'
+          })
+            .append($('<label class="form-control-label date required" for="user_date_of_birth_1i">Date of birth <abbr title="required">*</abbr></label>'))
+            .append($('<div>', {
+              class: 'd-flex flex-row justify-content-between align-items-center'
+            })
+              .append($('<select>', {
+                id: 'user_date_of_birth_1i',
+                name: 'user[date_of_birth(1i)]',
+                class: 'form-control mx-1 date required',
+                'data-client-side-validations-wrapper': 'vertical_multi_select'
+              })
+                .append($('<option value=""></option>'))
+                .append($('<option value="2015">2015</option>'))
+                .append($('<option value="2025">2025</option>')))
+              .append($('<select>', {
+                id: 'user_date_of_birth_2i',
+                name: 'user[date_of_birth(2i)]',
+                class: 'form-control mx-1 date required',
+                'data-client-side-validations-wrapper': 'vertical_multi_select'
+              })
+                .append($('<option value=""></option>'))
+                .append($('<option value="1">January</option>'))
+                .append($('<option value="2">February</option>')))
+              .append($('<select>', {
+                id: 'user_date_of_birth_3i',
+                name: 'user[date_of_birth(3i)]',
+                class: 'form-control mx-1 date required',
+                'data-client-side-validations-wrapper': 'vertical_multi_select'
+              })
+                .append($('<option value=""></option>'))
+                .append($('<option value="1">1</option>'))
+                .append($('<option value="2">2</option>'))
+                .append($('<option value="3">3</option>')))
+            )
+            .append('<small class="form-text text-muted">hint text</small>')
+          )
+          .append($('<div>', {
+            class:'form-group time required user_time_of_birth form-group-invalid'
+          })
+            .append($('<label class="form-control-label time required" for="user_time_of_birth_4i">Time of birth <abbr title="required">*</abbr></label>'))
+            .append($('<div>', {
+              class: 'd-flex flex-row justify-content-between align-items-center'
+            })
+              .append('<input type="hidden" id="user_time_of_birth_1i" name="user[time_of_birth(1i)]" value="1">')
+              .append('<input type="hidden" id="user_time_of_birth_2i" name="user[time_of_birth(2i)]" value="1">')
+              .append('<input type="hidden" id="user_time_of_birth_3i" name="user[time_of_birth(3i)]" value="1">')
+              .append($('<select>', {
+                id: 'user_time_of_birth_4i',
+                name: 'user[time_of_birth(4i)]',
+                class: 'form-control mx-1 is-invalid time required',
+                'data-client-side-validations-wrapper': 'vertical_multi_select'
+              })
+                .append($('<option value=""></option>'))
+                .append($('<option value="00">00</option>'))
+                .append($('<option value="23">23</option>'))
+              )
+              .append(':')
+              .append($('<select>', {
+                id: 'user_time_of_birth_5i',
+                name: 'user[time_of_birth(5i)]',
+                class: 'form-control mx-1 is-invalid time required',
+                'data-client-side-validations-wrapper': 'vertical_multi_select'
+              })
+                .append($('<option value=""></option>'))
+                .append($('<option value="00">00</option>'))
+                .append($('<option value="55">55</option>'))
+              )
+            )
+            .append('<div class="invalid-feedback d-block">Time of birth must be present.</div>')
+            .append('<small class="form-text text-muted">Hint: At what time you were born?</small>')
+        )
+      )
+
+    $('form#new_user').validate()
+  }
+})
+
+//I don think this multiple wrapper names makes sense here, because in SimpleForm different wrapper would have different DOM
+//but here DOM ($('#qunit-fixture')) is same for all tests.
+var wrappers = ['vertical_form']
+
+for (var i = 0; i < wrappers.length; i++) {
+  var wrapper = wrappers[i]
+
+  QUnit.test(wrapper + ' - Validate date input', function (assert) {
+    const form = $('form#new_user');
+    const select_year = form.find('select#user_date_of_birth_1i')
+    const select_month = form.find('select#user_date_of_birth_2i')
+    const select_day = form.find('select#user_date_of_birth_3i')
+
+    form[0].ClientSideValidations.settings.html_settings.wrapper = wrapper
+
+    select_year.trigger('focusout')
+    select_day.trigger('focusout')
+
+    assert.ok(select_year.closest('.form-group').hasClass('form-group-invalid'))
+    assert.ok(select_month.closest('.form-group').hasClass('form-group-invalid'))
+    assert.ok(select_year.closest('.form-group').find('div.invalid-feedback').length === 1)
+
+    select_year.val(2025).trigger('change').trigger('focusout')
+
+    assert.ok(select_year.closest('.form-group').hasClass('form-group-invalid'))
+    assert.ok(select_year.closest('.form-group').find('div.invalid-feedback').length === 1)
+
+    select_month.val(1).trigger('change').trigger('focusout')
+    select_day.val(1).trigger('change').trigger('focusout')
+
+    assert.notOk(select_year.closest('.form-group').hasClass('form-group-invalid'))
+    assert.ok(select_year.closest('.form-group').find('div.invalid-feedback').length === 0)
+  })
+
+  QUnit.test(wrapper + ' - Validate time input reusing server message', function (assert) {
+    const form = $('form#new_user');
+    const select_hour = form.find('select#user_time_of_birth_4i')
+    const select_minute = form.find('select#user_time_of_birth_5i')
+
+    form[0].ClientSideValidations.settings.html_settings.wrapper = wrapper
+
+    assert.ok(select_hour.closest('.form-group').hasClass('form-group-invalid'))
+    assert.ok(select_minute.closest('.form-group').hasClass('form-group-invalid'))
+    assert.ok(select_hour.closest('.form-group').find('div.invalid-feedback').length === 1)
+
+    select_hour.val(23).trigger('change').trigger('focusout')
+
+    assert.ok(select_hour.closest('.form-group').hasClass('form-group-invalid'))
+    assert.ok(select_minute.closest('.form-group').hasClass('form-group-invalid'))
+    assert.ok(select_hour.closest('.form-group').find('div.invalid-feedback').length === 1)
+
+    select_minute.val(55).trigger('change').trigger('focusout')
+
+    assert.notOk(select_hour.closest('.form-group').hasClass('form-group-invalid'))
+    assert.ok(select_hour.closest('.form-group').find('div.invalid-feedback').length === 0)
+  })
+}
diff --git a/test/javascript/public/test/form_builders/validateSimpleFormDateTime.js b/test/javascript/public/test/form_builders/validateSimpleFormDateTime.js
new file mode 100644
index 0000000..f172069
--- /dev/null
+++ b/test/javascript/public/test/form_builders/validateSimpleFormDateTime.js
@@ -0,0 +1,152 @@
+QUnit.module('Validate SimpleForm DateTime', {
+  before: function () {
+    currentFormBuilder = window.ClientSideValidations.formBuilders['SimpleForm::FormBuilder']
+    window.ClientSideValidations.formBuilders['SimpleForm::FormBuilder'] = DEFAULT_FORM_BUILDER
+  },
+
+  after: function () {
+    window.ClientSideValidations.formBuilders['SimpleForm::FormBuilder'] = currentFormBuilder
+  },
+
+  beforeEach: function () {
+    dataCsv = {
+      html_settings: {
+        type: 'SimpleForm::FormBuilder',
+        error_class: 'error',
+        error_tag: 'span',
+        wrapper_error_class: 'field_with_errors',
+        wrapper_tag: 'div',
+        wrapper_class: 'input',
+        wrapper: 'default'
+      },
+      validators: {
+        'user[date_of_birth]': { presence: [{ message: 'must be present' }] },
+        'user[time_of_birth]': { presence: [{ message: 'must be present' }] }
+      }
+    }
+
+    $('#qunit-fixture')
+      .append(
+        $('<form>', {
+          action: '/users',
+          'data-client-side-validations': JSON.stringify(dataCsv),
+          method: 'post',
+          id: 'new_user'
+        })
+          .append($('<div>', {
+            class:'input date required user_date_of_birth field_with_hint'
+          })
+            .append($('<label class="date required" for="user_date_of_birth_1i">Date of birth <abbr title="required">*</abbr></label>'))
+            .append($('<select>', {
+              id: 'user_date_of_birth_1i',
+              name: 'user[date_of_birth(1i)]',
+              class: 'date required',
+            })
+              .append($('<option value=""></option>'))
+              .append($('<option value="2015">2015</option>'))
+              .append($('<option value="2025">2025</option>')))
+            .append($('<select>', {
+              id: 'user_date_of_birth_2i',
+              name: 'user[date_of_birth(2i)]',
+              class: 'date required',
+            })
+              .append($('<option value=""></option>'))
+              .append($('<option value="1">January</option>'))
+              .append($('<option value="2">February</option>')))
+            .append($('<select>', {
+              id: 'user_date_of_birth_3i',
+              name: 'user[date_of_birth(3i)]',
+              class: 'date required',
+            })
+              .append($('<option value=""></option>'))
+              .append($('<option value="1">1</option>'))
+              .append($('<option value="2">2</option>'))
+              .append($('<option value="3">3</option>')))
+              .append('<span class="hint">hint text</span>')
+          )
+          .append($('<div>', {
+            class:'input time required box_price field_with_errors field_with_hint'
+          })
+            .append($('<label class="time required" for="user_time_of_birth_4i">Time of birth <abbr title="required">*</abbr></label>'))
+            .append('<input type="hidden" id="user_time_of_birth_1i" name="user[time_of_birth(1i)]" value="1">')
+            .append('<input type="hidden" id="user_time_of_birth_2i" name="user[time_of_birth(2i)]" value="1">')
+            .append('<input type="hidden" id="user_time_of_birth_3i" name="user[time_of_birth(3i)]" value="1">')
+            .append($('<select>', {
+              id: 'user_time_of_birth_4i',
+              name: 'user[time_of_birth(4i)]',
+              class: 'time required',
+              'aria-invalid': true
+            })
+              .append($('<option value=""></option>'))
+              .append($('<option value="00">00</option>'))
+              .append($('<option value="23">23</option>'))
+            )
+            .append(':')
+            .append($('<select>', {
+              id: 'user_time_of_birth_5i',
+              name: 'user[time_of_birth(5i)]',
+              class: 'time required',
+              'aria-invalid': true
+            })
+              .append($('<option value=""></option>'))
+              .append($('<option value="00">00</option>'))
+              .append($('<option value="55">55</option>'))
+            )
+            .append('<span class="hint">Hint: At what time you were born?</span>')
+            .append('<span class="error">Time of birth must be present.</span>')
+        )
+      )
+
+    $('form#new_user').validate()
+  }
+  })
+
+  QUnit.test('Validate date input', function (assert) {
+    const form = $('form#new_user');
+    const select_year = form.find('select#user_date_of_birth_1i')
+    const select_month = form.find('select#user_date_of_birth_2i')
+    const select_day = form.find('select#user_date_of_birth_3i')
+
+    form[0].ClientSideValidations.settings.html_settings.wrapper = wrapper
+
+    select_year.trigger('focusout')
+    select_day.trigger('focusout')
+
+    assert.ok(select_year.closest('.form-group').hasClass('form-group-invalid'))
+    assert.ok(select_month.closest('.form-group').hasClass('form-group-invalid'))
+    assert.ok(select_year.closest('.form-group').find('div.invalid-feedback').length === 1)
+
+    select_year.val(2025).trigger('change').trigger('focusout')
+
+    assert.ok(select_year.closest('.form-group').hasClass('form-group-invalid'))
+    assert.ok(select_year.closest('.form-group').find('div.invalid-feedback').length === 1)
+
+    select_month.val(1).trigger('change').trigger('focusout')
+    select_day.val(1).trigger('change').trigger('focusout')
+
+    assert.notOk(select_year.closest('.form-group').hasClass('form-group-invalid'))
+    assert.ok(select_year.closest('.form-group').find('div.invalid-feedback').length === 0)
+  })
+
+  QUnit.test('Validate time input reusing server message', function (assert) {
+    const form = $('form#new_user');
+    const select_hour = form.find('select#user_time_of_birth_4i')
+    const select_minute = form.find('select#user_time_of_birth_5i')
+
+    form[0].ClientSideValidations.settings.html_settings.wrapper = wrapper
+
+    assert.ok(select_hour.closest('.form-group').hasClass('form-group-invalid'))
+    assert.ok(select_minute.closest('.form-group').hasClass('form-group-invalid'))
+    assert.ok(select_hour.closest('.form-group').find('div.invalid-feedback').length === 1)
+
+    select_hour.val(23).trigger('change').trigger('focusout')
+
+    assert.ok(select_hour.closest('.form-group').hasClass('form-group-invalid'))
+    assert.ok(select_minute.closest('.form-group').hasClass('form-group-invalid'))
+    assert.ok(select_hour.closest('.form-group').find('div.invalid-feedback').length === 1)
+
+    select_minute.val(55).trigger('change').trigger('focusout')
+
+    assert.notOk(select_hour.closest('.form-group').hasClass('form-group-invalid'))
+    assert.ok(select_hour.closest('.form-group').find('div.invalid-feedback').length === 0)
+  })
diff --git a/vendor/assets/javascripts/rails.validations.simple_form.bootstrap4.js b/vendor/assets/javascripts/rails.validations.simple_form.bootstrap4.js
index 431ad3c..feaf840 100644
--- a/vendor/assets/javascripts/rails.validations.simple_form.bootstrap4.js
+++ b/vendor/assets/javascripts/rails.validations.simple_form.bootstrap4.js
@@ -29,6 +29,7 @@
     wrappers: {
       "default": {
         add: function add(element, settings, message) {
+          alert('bla');
           var wrapperElement = element.parent();
           var errorElement = wrapperElement.find(settings.error_tag + '.invalid-feedback');
 
diff --git a/vendor/assets/javascripts/rails.validations.simple_form.js b/vendor/assets/javascripts/rails.validations.simple_form.js
index 980273e..42ad6b1 100644
--- a/vendor/assets/javascripts/rails.validations.simple_form.js
+++ b/vendor/assets/javascripts/rails.validations.simple_form.js
@@ -29,6 +29,12 @@
     wrappers: {
       "default": {
         add: function add(element, settings, message) {
+          console.log(this);
+
+          if (element.is('select') && (element.hasClass('date') || element.hasClass('time'))) {
+            console.log(this);
+          }
+
           var wrapper = element.closest(settings.wrapper_tag + '.' + settings.wrapper_class.replace(/ /g, '.'));
           var errorElement = wrapper.find(settings.error_tag + '.' + settings.error_class.replace(/ /g, '.'));
 
@@ -50,15 +56,6 @@
           return errorElement.remove();
         }
       },
-
-      get horizontal_multi_select() {
-        return this.multi_select;
-      },
-
-      get vertical_multi_select() {
-        return this.multi_select;
-      },
-
       multi_select: {
         add: function add(element, settings, message) {
           var wrapperElement = element.closest(settings.wrapper_tag + '.' + settings.wrapper_class.replace(/ /g, '.'));