diff --git a/src/lib/api/schema.d.ts b/src/lib/api/schema.d.ts
index 9ae13cc..69d871b 100644
--- a/src/lib/api/schema.d.ts
+++ b/src/lib/api/schema.d.ts
@@ -723,6 +723,8 @@ export interface components {
     PaymentHistoryPoint: {
       /** Format: date */
       localDate: string;
+      /** @description Tehran-local hour bucket, present only for DAY periods. */
+      localHour?: number;
       /** Format: int64 */
       totalSessions: number;
       /** Format: int64 */
diff --git a/src/lib/components/AnalyticsPage.svelte b/src/lib/components/AnalyticsPage.svelte
index 9387fff..532c276 100644
--- a/src/lib/components/AnalyticsPage.svelte
+++ b/src/lib/components/AnalyticsPage.svelte
@@ -177,14 +177,18 @@
               ><ChartNoAxesCombinedIcon class="text-primary size-5" /> روند پرداخت‌های موفق</CardTitle
             >
             <p class="text-muted-foreground mt-1 text-xs">
-              برای دیدن مبلغ و تعداد هر روز، روی نقطه‌های نمودار بروید.
+              برای دیدن مبلغ و تعداد هر {run.period.periodType === 'DAY' ? 'ساعت' : 'روز'}، روی نقطه‌های
+              نمودار بروید.
             </p>
           </div>
           <Badge variant="secondary" class="rounded-md">{run.period.jalaliLabelFa}</Badge>
         </div>
       </CardHeader>
       <CardContent class="px-3 pt-5 sm:px-6"
-        ><PaymentHistoryChart data={overview.data.paymentHistory} /></CardContent
+        ><PaymentHistoryChart
+          data={overview.data.paymentHistory}
+          periodType={run.period.periodType}
+        /></CardContent
       >
     </Card>
 
diff --git a/src/lib/components/PaymentHistoryChart.svelte b/src/lib/components/PaymentHistoryChart.svelte
index 67a3292..eabf6e4 100644
--- a/src/lib/components/PaymentHistoryChart.svelte
+++ b/src/lib/components/PaymentHistoryChart.svelte
@@ -5,7 +5,8 @@
   import { formatMoney, formatValue } from '$lib/format';
 
   type Point = components['schemas']['PaymentHistoryPoint'];
-  let { data }: { data: Point[] } = $props();
+  type PeriodType = components['schemas']['PeriodType'];
+  let { data, periodType }: { data: Point[]; periodType: PeriodType } = $props();
   let active = $state<number | null>(null);
 
   const width = 760;
@@ -40,6 +41,27 @@
     );
   }
 
+  function persianHour(value: number) {
+    const hour = new Intl.NumberFormat('fa-IR', {
+      minimumIntegerDigits: 2,
+      maximumFractionDigits: 0,
+      useGrouping: false,
+    }).format(value);
+    return `${hour}:۰۰`;
+  }
+
+  function axisLabel(point: Point) {
+    return periodType === 'DAY' && point.localHour !== undefined
+      ? persianHour(point.localHour)
+      : persianDate(point.localDate);
+  }
+
+  function fullPointLabel(point: Point) {
+    return periodType === 'DAY' && point.localHour !== undefined
+      ? `${persianDate(point.localDate)}، ساعت ${persianHour(point.localHour)}`
+      : persianDate(point.localDate);
+  }
+
   function tooltipPosition(point: (typeof positions)[number]) {
     const horizontalPercent = (point.x / width) * 100;
     const verticalPercent = (point.y / height) * 100;
@@ -104,7 +126,7 @@
           fill="var(--muted-foreground)"
           font-size="9"
           text-anchor="middle"
-          direction="rtl">{persianDate(tick.localDate)}</text
+          direction="rtl">{axisLabel(tick)}</text
         >
       {/each}
       <text
@@ -113,7 +135,7 @@
         fill="var(--muted-foreground)"
         font-size="10"
         text-anchor="middle"
-        direction="rtl">تاریخ</text
+        direction="rtl">{periodType === 'DAY' ? 'ساعت' : 'تاریخ'}</text
       >
       <text
         x={-((pad.top + height - pad.bottom) / 2)}
@@ -147,7 +169,7 @@
           stroke-width="3"
           tabindex="0"
           role="button"
-          aria-label={`${persianDate(point.localDate)}، ${formatValue(point.bankPaidSessions)} پرداخت موفق`}
+          aria-label={`${fullPointLabel(point)}، ${formatValue(point.bankPaidSessions)} پرداخت موفق`}
           onmouseenter={() => (active = index)}
           onmouseleave={() => (active = null)}
           onfocus={() => (active = index)}
@@ -165,7 +187,7 @@
           class="rounded-md bg-zinc-950 p-3 text-right text-xs leading-6 text-white shadow-xl"
           transition:scale={{ duration: 150, start: 0.96 }}
         >
-          <strong class="block">{persianDate(positions[active].localDate)}</strong>
+          <strong class="block">{fullPointLabel(positions[active])}</strong>
           <span class="block text-white/75"
             >{formatValue(positions[active].bankPaidSessions)} پرداخت موفق</span
           >
diff --git a/src/lib/components/PaymentHistoryChart.test.ts b/src/lib/components/PaymentHistoryChart.test.ts
new file mode 100644
index 0000000..2f6037a
--- /dev/null
+++ b/src/lib/components/PaymentHistoryChart.test.ts
@@ -0,0 +1,32 @@
+import { render, screen } from '@testing-library/svelte';
+import { describe, expect, it } from 'vitest';
+
+import PaymentHistoryChart from './PaymentHistoryChart.svelte';
+
+describe('PaymentHistoryChart', () => {
+  it('uses Persian hour labels for a one-day period', () => {
+    render(PaymentHistoryChart, {
+      periodType: 'DAY',
+      data: [
+        {
+          localDate: '2026-07-01',
+          localHour: 0,
+          totalSessions: 10,
+          bankPaidSessions: 8,
+          bankPaidAmountRial: 800_000,
+        },
+        {
+          localDate: '2026-07-01',
+          localHour: 12,
+          totalSessions: 14,
+          bankPaidSessions: 11,
+          bankPaidAmountRial: 1_100_000,
+        },
+      ],
+    });
+
+    expect(screen.getByText('۰۰:۰۰')).not.toBeNull();
+    expect(screen.getByText('۱۲:۰۰')).not.toBeNull();
+    expect(screen.getByText('ساعت')).not.toBeNull();
+  });
+});