diff --git a/plugins/polio/api/campaigns/subactivities.py b/plugins/polio/api/campaigns/subactivities.py
index 4b80e42317..ec13175cd7 100644
--- a/plugins/polio/api/campaigns/subactivities.py
+++ b/plugins/polio/api/campaigns/subactivities.py
@@ -34,6 +34,10 @@ class Meta:
             "age_unit",
             "age_min",
             "age_max",
+            "lqas_ended_at",
+            "lqas_started_at",
+            "im_ended_at",
+            "im_started_at",
         ]
 
     def create(self, validated_data):
diff --git a/plugins/polio/migrations/0209_subactivity_im_ended_at_subactivity_im_started_at_and_more.py b/plugins/polio/migrations/0209_subactivity_im_ended_at_subactivity_im_started_at_and_more.py
new file mode 100644
index 0000000000..4938de7de9
--- /dev/null
+++ b/plugins/polio/migrations/0209_subactivity_im_ended_at_subactivity_im_started_at_and_more.py
@@ -0,0 +1,32 @@
+# Generated by Django 4.2.17 on 2024-12-11 14:19
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("polio", "0208_migrate_vrf_orpg_fields"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="subactivity",
+            name="im_ended_at",
+            field=models.DateField(blank=True, null=True),
+        ),
+        migrations.AddField(
+            model_name="subactivity",
+            name="im_started_at",
+            field=models.DateField(blank=True, null=True),
+        ),
+        migrations.AddField(
+            model_name="subactivity",
+            name="lqas_ended_at",
+            field=models.DateField(blank=True, null=True),
+        ),
+        migrations.AddField(
+            model_name="subactivity",
+            name="lqas_started_at",
+            field=models.DateField(blank=True, null=True),
+        ),
+    ]
diff --git a/plugins/polio/models/base.py b/plugins/polio/models/base.py
index 6ab4d5c94c..d3bfb3c833 100644
--- a/plugins/polio/models/base.py
+++ b/plugins/polio/models/base.py
@@ -288,6 +288,10 @@ class SubActivity(models.Model):
     age_max = models.IntegerField(null=True, blank=True)
     start_date = models.DateField(null=True, blank=True)
     end_date = models.DateField(null=True, blank=True)
+    im_started_at = models.DateField(null=True, blank=True)
+    im_ended_at = models.DateField(null=True, blank=True)
+    lqas_started_at = models.DateField(null=True, blank=True)
+    lqas_ended_at = models.DateField(null=True, blank=True)
 
     class Meta:
         verbose_name_plural = "subactivities"
diff --git a/plugins/polio/tests/test_subactivities.py b/plugins/polio/tests/test_subactivities.py
index 5226b9c885..fc5c713aa2 100644
--- a/plugins/polio/tests/test_subactivities.py
+++ b/plugins/polio/tests/test_subactivities.py
@@ -90,12 +90,20 @@ def test_update_sub_activity(self):
             "name": "Updated SubActivity",
             "start_date": "2022-03-01",
             "end_date": "2022-03-31",
+            "im_started_at": "2022-04-30",
+            "im_ended_at": "2022-05-01",
+            "lqas_started_at": "2022-04-29",
+            "lqas_ended_at": "2022-05-02",
             "scopes": [{"group": {"name": "Updated Group", "org_units": [self.org_unit.id]}, "vaccine": "mOPV2"}],
         }
         self.client.force_authenticate(self.user)
         response = self.client.put(BASE_URL + str(self.sub_activity.id) + "/", data, format="json")
         self.assertEqual(response.status_code, 200)
         self.assertEqual(SubActivity.objects.get(id=self.sub_activity.id).name, "Updated SubActivity")
+        self.assertEqual(SubActivity.objects.get(id=self.sub_activity.id).im_started_at, datetime.date(2022, 4, 30))
+        self.assertEqual(SubActivity.objects.get(id=self.sub_activity.id).im_ended_at, datetime.date(2022, 5, 1))
+        self.assertEqual(SubActivity.objects.get(id=self.sub_activity.id).lqas_started_at, datetime.date(2022, 4, 29))
+        self.assertEqual(SubActivity.objects.get(id=self.sub_activity.id).lqas_ended_at, datetime.date(2022, 5, 2))
 
     def test_anonymous_user_cannot_delete_sub_activity(self):
         self.client.force_authenticate(self.anon)