diff --git a/frontend/src/core/components/shared/config/configSections/audit/AuditEventsTable.tsx b/frontend/src/core/components/shared/config/configSections/audit/AuditEventsTable.tsx
index c339221af..a04c676df 100644
--- a/frontend/src/core/components/shared/config/configSections/audit/AuditEventsTable.tsx
+++ b/frontend/src/core/components/shared/config/configSections/audit/AuditEventsTable.tsx
@@ -131,8 +131,8 @@ const AuditEventsTable: React.FC<AuditEventsTableProps> = () => {
           <DateInput
             placeholder={t('audit.events.startDate', 'Start date')}
             value={filters.startDate ? new Date(filters.startDate) : null}
-            onChange={(value: Date | null) =>
-              handleFilterChange('startDate', value ? value.toISOString() : undefined)
+            onChange={(value: string | null) =>
+              handleFilterChange('startDate', value ?? undefined)
             }
             clearable
             style={{ flex: 1, minWidth: 150 }}
@@ -141,8 +141,8 @@ const AuditEventsTable: React.FC<AuditEventsTableProps> = () => {
           <DateInput
             placeholder={t('audit.events.endDate', 'End date')}
             value={filters.endDate ? new Date(filters.endDate) : null}
-            onChange={(value: Date | null) =>
-              handleFilterChange('endDate', value ? value.toISOString() : undefined)
+            onChange={(value: string | null) =>
+              handleFilterChange('endDate', value ?? undefined)
             }
             clearable
             style={{ flex: 1, minWidth: 150 }}
diff --git a/frontend/src/core/components/shared/config/configSections/audit/AuditExportSection.tsx b/frontend/src/core/components/shared/config/configSections/audit/AuditExportSection.tsx
index 025f10ba8..695c2e914 100644
--- a/frontend/src/core/components/shared/config/configSections/audit/AuditExportSection.tsx
+++ b/frontend/src/core/components/shared/config/configSections/audit/AuditExportSection.tsx
@@ -144,8 +144,8 @@ const AuditExportSection: React.FC<AuditExportSectionProps> = () => {
               <DateInput
                 placeholder={t('audit.export.startDate', 'Start date')}
                 value={filters.startDate ? new Date(filters.startDate) : null}
-                onChange={(value: Date | null) =>
-                  handleFilterChange('startDate', value ? value.toISOString() : undefined)
+                onChange={(value: string | null) =>
+                  handleFilterChange('startDate', value ?? undefined)
                 }
                 clearable
                 style={{ flex: 1, minWidth: 200 }}
@@ -154,8 +154,8 @@ const AuditExportSection: React.FC<AuditExportSectionProps> = () => {
               <DateInput
                 placeholder={t('audit.export.endDate', 'End date')}
                 value={filters.endDate ? new Date(filters.endDate) : null}
-                onChange={(value: Date | null) =>
-                  handleFilterChange('endDate', value ? value.toISOString() : undefined)
+                onChange={(value: string | null) =>
+                  handleFilterChange('endDate', value ?? undefined)
                 }
                 clearable
                 style={{ flex: 1, minWidth: 200 }}