diff --git a/src/api/api.js b/src/api/api.js
index 1017c1e4f..5a0eeae55 100644
--- a/src/api/api.js
+++ b/src/api/api.js
@@ -196,10 +196,8 @@ export async function getEntities(items, {
                     ...(options.filter && Object.keys(options.filter).length && generateFilter(options.filter)),
                     ...(calculateSystemProfile(filters)),
                     ...(fields && Object.keys(fields).length && generateFilter(fields, 'fields')),
-                    ...filters?.lastSeenFilter?.updatedStart &&
-                     filters?.lastSeenFilter?.updatedStart.length > 0 && { updated_start: filters.lastSeenFilter.updatedStart },
-                    ...filters?.lastSeenFilter?.updatedEnd &&
-                     filters?.lastSeenFilter?.updatedEnd.length > 0 && { updated_end: filters.lastSeenFilter.updatedEnd }
+                    ...filters?.lastSeenFilter?.updatedStart && { updated_start: filters.lastSeenFilter.updatedStart },
+                    ...filters?.lastSeenFilter?.updatedEnd && { updated_end: filters.lastSeenFilter.updatedEnd }
                 }
             }
         )
diff --git a/src/components/InventoryTable/EntityTableToolbar.js b/src/components/InventoryTable/EntityTableToolbar.js
index 67485a482..eca59613a 100644
--- a/src/components/InventoryTable/EntityTableToolbar.js
+++ b/src/components/InventoryTable/EntityTableToolbar.js
@@ -53,7 +53,7 @@ import useOperatingSystemFilter from '../filters/useOperatingSystemFilter';
 import useFeatureFlag from '../../Utilities/useFeatureFlag';
 import useGroupFilter from '../filters/useGroupFilter';
 import { DatePicker, Split, SplitItem } from '@patternfly/react-core';
-import { fromValidator, toValidator } from '../filters/helpers';
+import { fromValidator, oldestDate, toValidator } from '../filters/helpers';
 
 /**
  * Table toolbar used at top of inventory table.
@@ -350,7 +350,7 @@ const EntityTableToolbar = ({
         enabledFilters.updateMethodFilter && setUpdateMethodValue([]);
         enabledFilters.hostGroupFilter && setHostGroupValue([]);
         setEndDate();
-        setStartDate();
+        setStartDate(oldestDate);
         dispatch(setFilter([]));
         updateData({ page: 1, filters: [] });
     };
diff --git a/src/components/filters/useLastSeenFilter.js b/src/components/filters/useLastSeenFilter.js
index 42c18558c..fd0787a1f 100644
--- a/src/components/filters/useLastSeenFilter.js
+++ b/src/components/filters/useLastSeenFilter.js
@@ -60,7 +60,7 @@ export const useLastSeenFilter = (
             setValue({
                 ...lastSeenValue,
                 updatedStart: null,
-                updatedEnd: newApiEndDate
+                updatedEnd: `${newApiEndDate.format('YYYY-MM-DD')}T23:59:00.000Z`
             });
         } else {
             setValue({
@@ -79,7 +79,7 @@ export const useLastSeenFilter = (
         } else if (newApiStartDate > newApiEndDate || isNaN(newApiEndDate)) {
             setValue({
                 ...lastSeenValue,
-                updatedStart: newApiStartDate,
+                updatedStart: `${newApiStartDate.format('YYYY-MM-DD')}T00:00:00.000Z`,
                 updatedEnd: null
             });
         } else {