diff --git a/csm_web/frontend/src/components/section/SpacetimeEditModal.tsx b/csm_web/frontend/src/components/section/SpacetimeEditModal.tsx
index 0b1010de..c3960f53 100644
--- a/csm_web/frontend/src/components/section/SpacetimeEditModal.tsx
+++ b/csm_web/frontend/src/components/section/SpacetimeEditModal.tsx
@@ -37,7 +37,7 @@ const SpaceTimeEditModal = ({
     setShowSaveSpinner(true);
     isPermanent
       ? spacetimeModifyMutation.mutate({
-          dayOfWeek,
+          dayOfWeek: day,
           location: location,
           startTime: time
         })