diff --git a/frontend-modern/src/components/Workloads/GuestDrawerHistory.tsx b/frontend-modern/src/components/Workloads/GuestDrawerHistory.tsx
index 807aa0577..c88851e13 100644
--- a/frontend-modern/src/components/Workloads/GuestDrawerHistory.tsx
+++ b/frontend-modern/src/components/Workloads/GuestDrawerHistory.tsx
@@ -74,6 +74,12 @@ const EMPTY_HISTORY_RESPONSE: AllMetricsHistoryResponse = {
 
 const formatRangeLabel = (range: HistoryTimeRange): string => {
   switch (range) {
+    case '1h':
+      return '1 hour';
+    case '6h':
+      return '6 hours';
+    case '12h':
+      return '12 hours';
     case '24h':
       return '24 hours';
     case '7d':
diff --git a/frontend-modern/src/components/shared/__tests__/HistoryChart.test.tsx b/frontend-modern/src/components/shared/__tests__/HistoryChart.test.tsx
index 0e031c8f5..ee4a76560 100644
--- a/frontend-modern/src/components/shared/__tests__/HistoryChart.test.tsx
+++ b/frontend-modern/src/components/shared/__tests__/HistoryChart.test.tsx
@@ -118,8 +118,8 @@ describe('HistoryChart', () => {
     expect(screen.getByText('History')).toBeInTheDocument();
   });
 
-  it('exposes the Relay history range as a first-class chart option', () => {
-    expect(HISTORY_CHART_RANGES).toEqual(['24h', '7d', '14d', '30d', '90d']);
+  it('exposes the sub-day and Relay history ranges as first-class chart options', () => {
+    expect(HISTORY_CHART_RANGES).toEqual(['1h', '6h', '12h', '24h', '7d', '14d', '30d', '90d']);
   });
 
   it('positions the tooltip beside the hovered point when there is chart space', () => {
diff --git a/frontend-modern/src/components/shared/historyChartModel.ts b/frontend-modern/src/components/shared/historyChartModel.ts
index 683021896..66154aab6 100644
--- a/frontend-modern/src/components/shared/historyChartModel.ts
+++ b/frontend-modern/src/components/shared/historyChartModel.ts
@@ -31,7 +31,16 @@ export interface HistoryChartTooltipLayout {
   height: number;
 }
 
-export const HISTORY_CHART_RANGES: HistoryTimeRange[] = ['24h', '7d', '14d', '30d', '90d'];
+export const HISTORY_CHART_RANGES: HistoryTimeRange[] = [
+  '1h',
+  '6h',
+  '12h',
+  '24h',
+  '7d',
+  '14d',
+  '30d',
+  '90d',
+];
 
 export function formatHistoryChartTooltipValue(value: number, unit?: string): string {
   if (unit === '%') return `${value.toFixed(1)}%`;