diff --git a/meshmap_frontend/src/api.ts b/meshmap_frontend/src/api.ts
index 9bacdf4..3f987a6 100644
--- a/meshmap_frontend/src/api.ts
+++ b/meshmap_frontend/src/api.ts
@@ -40,6 +40,7 @@ import type {
   PositionRecord,
   PublicMapTileSourceResponse,
   PublicMapTileSourcesResponse,
+  SignDayCount,
   SignRecord,
   SignRecordPayload,
   TelemetryRecord,
@@ -173,6 +174,10 @@ export function getSignRecords(limit = 100, offset = 0, nodeIdOrOptions: string
   return getJSON<ListResponse<SignRecord>>(listPath('/api/signs', limit, offset, nodeIdOrOptions))
 }
 
+export function getSignDailyCounts(nodeIdOrOptions: string | ListQueryOptions = ''): Promise<ListResponse<SignDayCount>> {
+  return getJSON<ListResponse<SignDayCount>>(listPath('/api/signs/daily', 500, 0, nodeIdOrOptions))
+}
+
 export function getAdminSignRecords(limit = 100, offset = 0, nodeIdOrOptions: string | ListQueryOptions = ''): Promise<ListResponse<SignRecord>> {
   return getJSON<ListResponse<SignRecord>>(listPath('/api/admin/signs', limit, offset, nodeIdOrOptions))
 }
diff --git a/meshmap_frontend/src/components/SignedPage.vue b/meshmap_frontend/src/components/SignedPage.vue
index 9cd3e79..a2e2baa 100644
--- a/meshmap_frontend/src/components/SignedPage.vue
+++ b/meshmap_frontend/src/components/SignedPage.vue
@@ -1,19 +1,61 @@
 <script setup lang="ts">
-import { onMounted, ref } from 'vue'
-import { getSignRecords } from '../api'
+import { computed, onMounted, ref, watch } from 'vue'
+import { getSignDailyCounts, getSignRecords } from '../api'
 import type { SignRecord } from '../types'
 
 const pageSize = 25
 const records = ref<SignRecord[]>([])
 const loading = ref(false)
+const calendarLoading = ref(false)
 const error = ref('')
 const page = ref(1)
 const total = ref(0)
+const calendarMonth = ref(new Date())
+const dailyCounts = ref<Record<string, number>>({})
+const selectedDate = ref('')
+const weekdays = ['日', '一', '二', '三', '四', '五', '六']
+
+const calendarDays = computed(() => monthDays(calendarMonth.value))
 
 function formatTime(value: string): string {
   return new Date(value).toLocaleString()
 }
 
+function formatMonth(value: Date): string {
+  return `${value.getFullYear()}年${value.getMonth() + 1}月`
+}
+
+function formatSelectedDate(value: string): string {
+  const [year, month, day] = value.split('-')
+  return `${year}年${Number(month)}月${Number(day)}日`
+}
+
+function formatDateKey(value: Date): string {
+  const year = value.getFullYear()
+  const month = String(value.getMonth() + 1).padStart(2, '0')
+  const day = String(value.getDate()).padStart(2, '0')
+  return `${year}-${month}-${day}`
+}
+
+function monthDays(value: Date): Array<string | null> {
+  const year = value.getFullYear()
+  const month = value.getMonth()
+  const firstDay = new Date(year, month, 1).getDay()
+  const daysInMonth = new Date(year, month + 1, 0).getDate()
+  const days: Array<string | null> = Array(firstDay).fill(null)
+  for (let day = 1; day <= daysInMonth; day += 1) {
+    days.push(formatDateKey(new Date(year, month, day)))
+  }
+  return days
+}
+
+function dateRangeForDay(value: string): { since: string; until: string } {
+  const [year, month, day] = value.split('-').map(Number)
+  const start = new Date(year, month - 1, day)
+  const end = new Date(year, month - 1, day, 23, 59, 59, 999)
+  return { since: start.toISOString(), until: end.toISOString() }
+}
+
 function canPrev(): boolean {
   return page.value > 1
 }
@@ -22,12 +64,31 @@ function canNext(): boolean {
   return page.value * pageSize < total.value || records.value.length === pageSize
 }
 
+async function loadCalendar() {
+  calendarLoading.value = true
+  error.value = ''
+  try {
+    const year = calendarMonth.value.getFullYear()
+    const month = calendarMonth.value.getMonth()
+    const since = new Date(year, month, 1).toISOString()
+    const until = new Date(year, month + 1, 1).toISOString()
+    const response = await getSignDailyCounts({ since, until })
+    dailyCounts.value = Object.fromEntries(response.items.map((item) => [item.date, item.count]))
+  } catch (err) {
+    error.value = err instanceof Error ? err.message : String(err)
+  } finally {
+    calendarLoading.value = false
+  }
+}
+
 async function loadRecords(nextPage = page.value) {
   loading.value = true
   error.value = ''
   try {
     const safePage = Math.max(1, nextPage)
-    const response = await getSignRecords(pageSize, (safePage - 1) * pageSize)
+    const response = selectedDate.value
+      ? await getSignRecords(pageSize, (safePage - 1) * pageSize, dateRangeForDay(selectedDate.value))
+      : await getSignRecords(pageSize, (safePage - 1) * pageSize)
     records.value = response.items
     total.value = response.total ?? response.offset + response.items.length
     page.value = safePage
@@ -38,11 +99,72 @@ async function loadRecords(nextPage = page.value) {
   }
 }
 
-onMounted(() => loadRecords())
+function previousMonth() {
+  calendarMonth.value = new Date(calendarMonth.value.getFullYear(), calendarMonth.value.getMonth() - 1, 1)
+}
+
+function nextMonth() {
+  calendarMonth.value = new Date(calendarMonth.value.getFullYear(), calendarMonth.value.getMonth() + 1, 1)
+}
+
+function selectDate(value: string) {
+  selectedDate.value = selectedDate.value === value ? '' : value
+  loadRecords(1)
+}
+
+function clearSelectedDate() {
+  selectedDate.value = ''
+  loadRecords(1)
+}
+
+watch(calendarMonth, () => loadCalendar())
+
+onMounted(() => {
+  loadCalendar()
+  loadRecords()
+})
 </script>
 
 <template>
   <section class="admin-dashboard">
+    <div class="panel admin-status-panel signed-calendar-panel">
+      <div class="panel-header">
+        <div>
+          <p class="eyebrow">Calendar</p>
+          <h2>签到日历</h2>
+        </div>
+        <span class="counter">{{ calendarLoading ? '加载中...' : formatMonth(calendarMonth) }}</span>
+      </div>
+
+      <div class="signed-calendar-toolbar">
+        <button class="admin-button ghost" :disabled="calendarLoading" @click="previousMonth">上一月</button>
+        <strong>{{ formatMonth(calendarMonth) }}</strong>
+        <button class="admin-button ghost" :disabled="calendarLoading" @click="nextMonth">下一月</button>
+      </div>
+
+      <div class="signed-calendar-grid">
+        <div v-for="weekday in weekdays" :key="weekday" class="signed-calendar-weekday">{{ weekday }}</div>
+        <template v-for="(day, index) in calendarDays" :key="day || `empty-${index}`">
+          <div v-if="!day" class="signed-calendar-day empty" aria-hidden="true"></div>
+          <button
+            v-else
+            type="button"
+            class="signed-calendar-day"
+            :class="{ selected: selectedDate === day, 'has-signs': dailyCounts[day] }"
+            @click="selectDate(day)"
+          >
+            <span class="signed-calendar-date">{{ Number(day.slice(8, 10)) }}</span>
+            <span v-if="dailyCounts[day]" class="signed-calendar-count">{{ dailyCounts[day] }} 人</span>
+          </button>
+        </template>
+      </div>
+
+      <div v-if="selectedDate" class="signed-filter-info">
+        <span>当前筛选：{{ formatSelectedDate(selectedDate) }}</span>
+        <button class="admin-button ghost" :disabled="loading" @click="clearSelectedDate">清除筛选</button>
+      </div>
+    </div>
+
     <div class="panel admin-status-panel">
       <div class="panel-header">
         <div>
diff --git a/meshmap_frontend/src/style.css b/meshmap_frontend/src/style.css
index d15b01e..0fe83de 100644
--- a/meshmap_frontend/src/style.css
+++ b/meshmap_frontend/src/style.css
@@ -1232,6 +1232,98 @@ h3 {
   transform: translateY(-1px);
 }
 
+.signed-calendar-panel {
+  overflow: visible;
+}
+
+.signed-calendar-toolbar {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 12px;
+  padding: 14px 16px;
+}
+
+.signed-calendar-toolbar strong {
+  color: var(--color-heading);
+  font-size: 18px;
+}
+
+.signed-calendar-grid {
+  display: grid;
+  grid-template-columns: repeat(7, minmax(0, 1fr));
+  gap: 6px;
+  padding: 0 16px 16px;
+}
+
+.signed-calendar-weekday {
+  padding: 8px 4px;
+  color: var(--color-muted);
+  text-align: center;
+  font-size: 12px;
+  font-weight: 700;
+}
+
+.signed-calendar-day {
+  min-height: 74px;
+  border: 1px solid var(--color-border);
+  border-radius: var(--radius-sm);
+  padding: 8px;
+  color: var(--color-text);
+  background: var(--color-surface-soft);
+  text-align: left;
+  transition: background-color 0.16s ease, border-color 0.16s ease, box-shadow 0.16s ease, transform 0.16s ease;
+}
+
+button.signed-calendar-day:not(:disabled):hover {
+  border-color: var(--color-primary);
+  background: var(--color-primary-soft);
+  transform: translateY(-1px);
+}
+
+.signed-calendar-day.empty {
+  border-color: transparent;
+  background: transparent;
+}
+
+.signed-calendar-day.has-signs {
+  border-color: color-mix(in srgb, var(--color-primary) 42%, white);
+  background: var(--color-primary-soft);
+}
+
+.signed-calendar-day.selected {
+  border-color: var(--color-primary);
+  color: #fff;
+  background: var(--color-primary);
+  box-shadow: var(--shadow-sm);
+}
+
+.signed-calendar-date,
+.signed-calendar-count {
+  display: block;
+}
+
+.signed-calendar-date {
+  color: inherit;
+  font-weight: 800;
+}
+
+.signed-calendar-count {
+  margin-top: 8px;
+  font-size: 12px;
+  font-weight: 700;
+}
+
+.signed-filter-info {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 12px;
+  padding: 12px 16px;
+  border-top: 1px solid var(--color-border);
+  color: var(--color-muted);
+}
+
 .pagination {
   display: flex;
   align-items: center;
@@ -1427,11 +1519,27 @@ dd {
 
   .pagination,
   .confirm-modal-actions,
-  .admin-session-card {
+  .admin-session-card,
+  .signed-filter-info {
     align-items: stretch;
     flex-direction: column;
   }
 
+  .signed-calendar-toolbar {
+    align-items: stretch;
+    flex-direction: column;
+    text-align: center;
+  }
+
+  .signed-calendar-grid {
+    gap: 4px;
+  }
+
+  .signed-calendar-day {
+    min-height: 56px;
+    padding: 6px;
+  }
+
   .map-container {
     min-height: 360px;
   }
diff --git a/meshmap_frontend/src/types.ts b/meshmap_frontend/src/types.ts
index e354bae..f561d66 100644
--- a/meshmap_frontend/src/types.ts
+++ b/meshmap_frontend/src/types.ts
@@ -158,6 +158,11 @@ export interface SignRecord {
   sign_time: string
 }
 
+export interface SignDayCount {
+  date: string
+  count: number
+}
+
 export interface SignRecordPayload {
   node_id: string
   long_name: string
diff --git a/sign_store.go b/sign_store.go
index 0042267..0e81753 100644
--- a/sign_store.go
+++ b/sign_store.go
@@ -19,12 +19,30 @@ func (s *store) ListSigns(opts listOptions) ([]signRecord, error) {
 	return rows, q.Find(&rows).Error
 }
 
+type signDayCount struct {
+	Date  string `gorm:"column:sign_date"`
+	Count int64  `gorm:"column:count"`
+}
+
 func (s *store) CountSigns(opts listOptions) (int64, error) {
 	var total int64
 	q := applySignFilters(s.db.Model(&signRecord{}), opts)
 	return total, q.Count(&total).Error
 }
 
+func (s *store) CountSignsByDay(opts listOptions) ([]signDayCount, error) {
+	var rows []signDayCount
+	dateExpr := "date(sign_time)"
+	if s.driver == databaseDriverMySQL {
+		dateExpr = "DATE(sign_time)"
+	}
+	q := applySignFilters(s.db.Model(&signRecord{}), opts).
+		Select(dateExpr + " AS sign_date, COUNT(*) AS count").
+		Group(dateExpr).
+		Order("sign_date DESC")
+	return rows, q.Scan(&rows).Error
+}
+
 func (s *store) GetSignByID(id uint64) (*signRecord, error) {
 	var row signRecord
 	if err := s.db.Where("id = ?", id).Take(&row).Error; err != nil {
diff --git a/web.go b/web.go
index 984ec79..acd1ba0 100644
--- a/web.go
+++ b/web.go
@@ -88,6 +88,14 @@ func registerAPIRoutes(r gin.IRouter, store *store, mapTileCacheDir string) {
 		total, err := store.CountSigns(opts)
 		writeListResponseWithTotal(c, rows, opts, total, err, signDTO)
 	})
+	r.GET("/signs/daily", func(c *gin.Context) {
+		opts, ok := parseListOptions(c)
+		if !ok {
+			return
+		}
+		rows, err := store.CountSignsByDay(opts)
+		writeListResponse(c, rows, opts, err, signDayCountDTO)
+	})
 	r.GET("/text-messages", func(c *gin.Context) {
 		opts, ok := parseListOptions(c)
 		if !ok {
@@ -617,6 +625,10 @@ func signDTO(row signRecord) gin.H {
 	return gin.H{"id": row.ID, "node_id": row.NodeID, "long_name": ptrString(row.LongName), "short_name": ptrString(row.ShortName), "sign_text": row.SignText, "sign_time": row.SignTime}
 }
 
+func signDayCountDTO(row signDayCount) gin.H {
+	return gin.H{"date": row.Date, "count": row.Count}
+}
+
 func textMessageDTO(row textMessageRecord) gin.H {
 	return gin.H{"id": row.ID, "from_id": row.FromID, "from_num": row.FromNum, "packet_id": ptrInt64(row.PacketID), "text": ptrString(row.Text), "topic": row.Topic, "channel_id": ptrString(row.ChannelID), "created_at": row.CreatedAt, "mqtt_remote_host": ptrString(row.MQTTRemoteHost), "content_json": row.ContentJSON}
 }