diff --git a/src/actions/sponsor-settings-actions.js b/src/actions/sponsor-settings-actions.js
index 102241c25..b944d8562 100644
--- a/src/actions/sponsor-settings-actions.js
+++ b/src/actions/sponsor-settings-actions.js
@@ -177,18 +177,30 @@ const normalizeEntityFprPurchaseAPI = (entity, summitTZ) => {
 
   normalizedEntity.wire_transfer_notification_email =
     wire_transfer_notification_email?.split(";") || [];
-  normalizedEntity.early_bird_end_date = moment
-    .tz(early_bird_end_date, summitTZ)
-    .unix();
-  normalizedEntity.standard_price_end_date = moment
-    .tz(standard_price_end_date, summitTZ)
-    .unix();
-  normalizedEntity.onsite_price_start_date = moment
-    .tz(onsite_price_start_date, summitTZ)
-    .unix();
-  normalizedEntity.onsite_price_end_date = moment
-    .tz(onsite_price_end_date, summitTZ)
-    .unix();
+
+  if (early_bird_end_date)
+    normalizedEntity.early_bird_end_date = moment
+      .tz(early_bird_end_date, summitTZ)
+      .unix();
+  else delete normalizedEntity.early_bird_end_date;
+
+  if (standard_price_end_date)
+    normalizedEntity.standard_price_end_date = moment
+      .tz(standard_price_end_date, summitTZ)
+      .unix();
+  else delete normalizedEntity.standard_price_end_date;
+
+  if (onsite_price_start_date)
+    normalizedEntity.onsite_price_start_date = moment
+      .tz(onsite_price_start_date, summitTZ)
+      .unix();
+  else delete normalizedEntity.onsite_price_start_date;
+
+  if (onsite_price_end_date)
+    normalizedEntity.onsite_price_end_date = moment
+      .tz(onsite_price_end_date, summitTZ)
+      .unix();
+  else delete normalizedEntity.onsite_price_end_date;
 
   return normalizedEntity;
 };
diff --git a/src/components/forms/sponsor-settings-form/index.js b/src/components/forms/sponsor-settings-form/index.js
index e16735827..3dbfe3720 100644
--- a/src/components/forms/sponsor-settings-form/index.js
+++ b/src/components/forms/sponsor-settings-form/index.js
@@ -58,9 +58,10 @@ const SponsorSettingsForm = ({ settings, onSubmit, summitTZ }) => {
   const formik = useFormik({
     initialValues: buildInitialValues(settings, summitTZ),
     validationSchema: yup.object({
-      early_bird_end_date: yup.date(T.translate("validation.date")),
+      early_bird_end_date: yup.date(T.translate("validation.date")).nullable(),
       standard_price_end_date: yup
         .date(T.translate("validation.date"))
+        .nullable()
         .isAfterDateField(
           yup.ref("early_bird_end_date"),
           T.translate("validation.after", {
@@ -70,6 +71,7 @@ const SponsorSettingsForm = ({ settings, onSubmit, summitTZ }) => {
         ),
       onsite_price_start_date: yup
         .date(T.translate("validation.date"))
+        .nullable()
         .isAfterDateField(
           yup.ref("standard_price_end_date"),
           T.translate("validation.after", {
@@ -79,6 +81,7 @@ const SponsorSettingsForm = ({ settings, onSubmit, summitTZ }) => {
         ),
       onsite_price_end_date: yup
         .date(T.translate("validation.date"))
+        .nullable()
         .isAfterDateField(
           yup.ref("onsite_price_start_date"),
           T.translate("validation.after", {