diff --git a/atst/forms/task_order.py b/atst/forms/task_order.py
index 99c1e35d..fca7bcfd 100644
--- a/atst/forms/task_order.py
+++ b/atst/forms/task_order.py
@@ -51,6 +51,16 @@ class CLINForm(FlaskForm):
     )
     loas = FieldList(StringField())
 
+    def validate(self, *args, **kwargs):
+        valid = super().validate(*args, **kwargs)
+        if self.start_date.data > self.end_date.data:
+            self.start_date.errors.append(
+                translate("forms.task_order.start_date_error")
+            )
+            return False
+        else:
+            return valid
+
 
 class TaskOrderForm(BaseForm):
     number = StringField(label=translate("forms.task_order.number_description"))
diff --git a/templates/components/date_picker.html b/templates/components/date_picker.html
index 6924eddc..c41db3d0 100644
--- a/templates/components/date_picker.html
+++ b/templates/components/date_picker.html
@@ -80,10 +80,10 @@
         </div>
       </div>
 
-      <p class="usa-input-error-message" v-bind:class="{ 'form-has-errors': !isWithinDateRange }">
-        {% if maxdate and mindate %}Date must be between {{mindate.strftime("%m/%d/%Y")}} and {{maxdate.strftime("%m/%d/%Y")}}{% endif %}
-        {% if maxdate and not mindate %}Date must be before or on {{maxdate.strftime("%m/%d/%Y")}}{% endif %}
-        {% if mindate and not maxdate %}Date must be after or on {{mindate.strftime("%m/%d/%Y")}}{% endif %}
+      <p class="usa-input-error-message" v-bind:class='{% if field.errors %}"form-has-errors"{% endif %}'>
+        {% if field.errors %}
+          {{ field.errors[0] }}
+        {% endif %}
       </p>
     </fieldset>
   </date-selector>
diff --git a/templates/task_orders/step_3.html b/templates/task_orders/step_3.html
index f1c3d115..ddead4f6 100644
--- a/templates/task_orders/step_3.html
+++ b/templates/task_orders/step_3.html
@@ -138,14 +138,15 @@
 
       <div class="form-row">
         {% if fields %}
-          <div class="form-col">
+          <div class="form-col form-col--half">
             {{ DatePicker(fields.start_date, watch=True, optional=False) }}
           </div>
-          <div class="form-col">
+          <div class="form-col form-col--half">
             {{ DatePicker(fields.end_date, watch=True, optional=False) }}
           </div>
+
         {% else %}
-          <div class="form-col">
+          <div class="form-col form-col--half">
             <date-selector :name-tag="'clins-' + clinIndex + '-start_date'" :watch='true' :optional='false' inline-template>
               <fieldset class="usa-input date-picker" v-bind:class="{ 'usa-input--success': isDateValid }">
                 <legend>
@@ -209,7 +210,7 @@
             </date-selector>
           </div>
 
-          <div class="form-col">
+          <div class="form-col form-col--half">
             <date-selector :name-tag="'clins-' + clinIndex + '-end_date'" :watch='true' :optional='false' inline-template>
               <fieldset class="usa-input date-picker" v-bind:class="{ 'usa-input--success': isDateValid }">
                 <legend>
diff --git a/tests/forms/test_task_order.py b/tests/forms/test_task_order.py
index d814f4de..d9ba3080 100644
--- a/tests/forms/test_task_order.py
+++ b/tests/forms/test_task_order.py
@@ -1,5 +1,8 @@
+import datetime
+
 from atst.forms.task_order import CLINForm
 from atst.models import JEDICLINType
+from atst.utils.localization import translate
 
 import tests.factories as factories
 
@@ -9,3 +12,21 @@ def test_clin_form_jedi_clin_type():
     clin = factories.CLINFactory.create(jedi_clin_type=jedi_type)
     clin_form = CLINForm(obj=clin)
     assert clin_form.jedi_clin_type.data == jedi_type.value
+
+
+def test_clin_form_start_date_before_end_date():
+    invalid_start = datetime.date(2020, 12, 12)
+    invalid_end = datetime.date(2020, 1, 1)
+    invalid_clin = factories.CLINFactory.create(
+        start_date=invalid_start, end_date=invalid_end
+    )
+    clin_form = CLINForm(obj=invalid_clin)
+    assert not clin_form.validate()
+    assert translate("forms.task_order.start_date_error") in clin_form.start_date.errors
+    valid_start = datetime.date(2020, 1, 1)
+    valid_end = datetime.date(2020, 12, 12)
+    valid_clin = factories.CLINFactory.create(
+        start_date=valid_start, end_date=valid_end
+    )
+    valid_clin_form = CLINForm(obj=valid_clin)
+    assert valid_clin_form.validate()
diff --git a/translations.yaml b/translations.yaml
index b53b18cb..09557f5e 100644
--- a/translations.yaml
+++ b/translations.yaml
@@ -175,6 +175,7 @@ forms:
     number_description: Task order number (13 digits)
     scope_description: 'What do you plan to do on the cloud? Some examples might include migrating an existing application or creating a prototype. You don’t need to include a detailed plan of execution, but should list key requirements. This section will be reviewed by your contracting officer, but won’t be sent to the CCPO. <p>Not sure how to describe your scope? <a href="#">Read some examples</a> to get some inspiration.</p>'
     scope_label: Cloud project scope
+    start_date_error: PoP start date must be before end date.
     start_date_label: Start of period of performance (PoP)
     team_experience:
       built_1: Built, migrated, or consulted on 1-2 applications