diff --git a/src/api/issue.api.ts b/src/api/issue.api.ts
index 12e7e8c..255b58c 100644
--- a/src/api/issue.api.ts
+++ b/src/api/issue.api.ts
@@ -68,6 +68,12 @@ export interface DailyIssueStats {
   days: DailyIssueStat[]
 }
 
+export interface CalendarIssues {
+  list: Issue[]
+  /** The range holds more issues than returned — narrow the filter */
+  truncated: boolean
+}
+
 // CLIENT REQUEST
 
 export async function itemsList(params: {
@@ -77,6 +83,7 @@ export async function itemsList(params: {
   status?: string | string[] | null
   assigneeId?: string | null
   projectId?: string | null
+  hasDueDate?: boolean
 }) {
   const query = toQuery({
     page: params.page,
@@ -85,10 +92,29 @@ export async function itemsList(params: {
     text: params.text,
     assigneeId: params.assigneeId,
     status: Array.isArray(params.status) ? params.status.join(',') : params.status,
+    hasDueDate: params.hasDueDate === undefined ? undefined : String(params.hasDueDate),
   })
   return apiClient.get<{ list: Issue[]; meta: Meta }>(`/api/issues/list${query}`)
 }
 
+/** Issues with dueDate in [from, to); from/to are ISO moments with an offset */
+export async function itemsCalendar(params: {
+  from: string
+  to: string
+  projectId?: string | null
+  assigneeId?: string | null
+  status?: string[] | null
+}) {
+  const query = toQuery({
+    from: params.from,
+    to: params.to,
+    projectId: params.projectId,
+    assigneeId: params.assigneeId,
+    status: params.status?.join(','),
+  })
+  return apiClient.get<CalendarIssues>(`/api/issues/calendar${query}`)
+}
+
 export async function itemGetByKey(ckey: string) {
   return apiClient.get<Issue>(`/api/issues/by-key/${ckey}`)
 }
diff --git a/src/components/BackButton.vue b/src/components/BackButton.vue
index 0949067..fded4dd 100644
--- a/src/components/BackButton.vue
+++ b/src/components/BackButton.vue
@@ -10,7 +10,10 @@ const backTo = computed(() => {
 })
 
 function goBack() {
-  if (backTo.value) router.push({ name: backTo.value })
+  // vue-router keeps the previous in-app location in history.state.back;
+  // it's null when the page was opened directly, so fall back to backTo
+  if (window.history.state?.back) router.back()
+  else if (backTo.value) router.push({ name: backTo.value })
 }
 </script>
 
diff --git a/src/stores/issue.ts b/src/stores/issue.ts
index d7d0f13..62c6417 100644
--- a/src/stores/issue.ts
+++ b/src/stores/issue.ts
@@ -6,6 +6,7 @@ import {
   type DailyIssueStats,
   itemCreate,
   itemDailyStat,
+  itemsCalendar,
   itemDelete,
   itemGetByKey,
   itemsList,
@@ -34,6 +35,7 @@ export const useIssueStore = defineStore('item', () => {
     status?: string | string[] | null
     assigneeId?: string | null
     projectId?: string | null
+    hasDueDate?: boolean
   }) {
     try {
       const res = await itemsList(params)
@@ -45,6 +47,14 @@ export const useIssueStore = defineStore('item', () => {
     }
   }
 
+  async function calendar(params: { from: string; to: string; projectId?: string | null }) {
+    try {
+      return await itemsCalendar(params)
+    } catch (e) {
+      error.value = e instanceof Error ? e.message : 'error get calendar issues'
+    }
+  }
+
   async function getByKey(ckey: string) {
     try {
       return await itemGetByKey(ckey)
@@ -110,7 +120,7 @@ export const useIssueStore = defineStore('item', () => {
     }
   }
 
-  return { stats, dailyStats, list, getByKey, create, update, remove, getStat, getDailyStat }
+  return { stats, dailyStats, list, calendar, getByKey, create, update, remove, getStat, getDailyStat }
 })
 
 /** Local YYYY-MM-DD `days` days before today */
diff --git a/src/views/HomeView.vue b/src/views/HomeView.vue
index 8b96060..84690b2 100644
--- a/src/views/HomeView.vue
+++ b/src/views/HomeView.vue
@@ -153,8 +153,6 @@ function onClickCard(status?: string) {
         <dashboard-count-card label="Overdue" :value="overdueCount" :alert="overdueCount > 0" />
       </div>
 
-      <v-divider />
-
       <v-row density="compact">
         <v-col cols="12" md="6">
           <v-card border>
diff --git a/src/views/calendar/CalendarView.vue b/src/views/calendar/CalendarView.vue
index ec8f6a8..cd2abc2 100644
--- a/src/views/calendar/CalendarView.vue
+++ b/src/views/calendar/CalendarView.vue
@@ -1,54 +1,438 @@
 <script setup lang="ts">
-import { ref } from 'vue'
+import { computed, ref, watch } from 'vue'
+import { storeToRefs } from 'pinia'
+import { useRouter } from 'vue-router'
+import { watchDebounced } from '@vueuse/core'
+import { useIssueStore } from '@/stores/issue.ts'
+import { useProjectStore } from '@/stores/project.ts'
+import { useStatusStore } from '@/stores/status.ts'
+import type { Issue } from '@/api/issue.api.ts'
 
 interface CalendarEvent {
   name: string
-  start: Date | string | number
-  end?: Date | string | number
-  color?: string
-  timed?: boolean
+  start: string
+  color: string
+  issue: Issue
 }
 
-const type = ref('month')
-const types = ['month', 'week', 'day', '4day']
-const mode = ref('stack')
-const modes = ['stack', 'column']
-const weekday = ref([0, 1, 2, 3, 4, 5, 6])
-const weekdays = [
-  { title: 'Sun - Sat', value: [0, 1, 2, 3, 4, 5, 6] },
-  { title: 'Mon - Sun', value: [1, 2, 3, 4, 5, 6, 0] },
-  { title: 'Mon - Fri', value: [1, 2, 3, 4, 5] },
-  { title: 'Mon, Wed, Fri', value: [1, 3, 5] },
-]
-const value = ref('')
-const events = ref<CalendarEvent[]>([])
-const colors = ['blue', 'indigo', 'deep-purple', 'cyan', 'green', 'orange', 'grey-darken-1']
-const names = ['Meeting', 'Holiday', 'PTO', 'Travel', 'Event', 'Birthday', 'Conference', 'Party']
-
-function rnd(a: number, b: number) {
-  return Math.floor((b - a + 1) * Math.random()) + a
+interface CalendarRange {
+  start: { date: string }
+  end: { date: string }
 }
 
-function getEvents() {
-  events.value = [
-    {
-      name: 'test',
-      start: new Date('2026-10-09T13:41:45.213Z'),
-      end: new Date('2026-10-11T13:41:45.213Z'),
-      color: 'primary',
-      timed: true,
-    },
-  ]
+const UNSCHEDULED_LIMIT = 20
+const DRAG_TYPE = 'application/x-ulitka-issue'
+
+const issueStore = useIssueStore()
+const statusStore = useStatusStore()
+const { currentProjectId } = storeToRefs(useProjectStore())
+const router = useRouter()
+
+const calendarRef = ref<{ prev: () => void; next: () => void }>()
+const focus = ref(toLocalDate(new Date()))
+const range = ref<CalendarRange>()
+
+const scheduled = ref<Issue[]>([])
+const truncated = ref(false)
+const loadingScheduled = ref(false)
+
+const unscheduled = ref<Issue[]>([])
+const unscheduledPage = ref(1)
+const unscheduledTotalPages = ref(0)
+const unscheduledTotal = ref(0)
+const loadingUnscheduled = ref(false)
+const search = ref<string | null>(null)
+
+/** Day picked on the calendar — target for the "+" buttons in the unscheduled list */
+const selectedDate = ref<string | null>(null)
+const dragOverDate = ref<string | null>(null)
+const dragOverPanel = ref(false)
+const savingIds = ref<number[]>([])
+
+const title = computed(() => {
+  const [year, month] = focus.value.split('-').map(Number)
+  return new Date(year!, month! - 1, 1).toLocaleDateString('en-US', { month: 'long', year: 'numeric' })
+})
+
+const events = computed<CalendarEvent[]>(() =>
+  scheduled.value
+    .filter((issue) => issue.dueDate)
+    .map((issue) => ({
+      name: `${issue.key} ${issue.title}`,
+      start: toLocalDate(new Date(issue.dueDate!)),
+      color: statusColor(issue.status),
+      issue,
+    })),
+)
+
+function statusColor(status: Issue['status']) {
+  return statusStore.statuses?.find((el) => el.alias === status)?.color ?? 'primary'
+}
+
+/** Local YYYY-MM-DD of a moment */
+function toLocalDate(date: Date): string {
+  const pad = (value: number) => String(value).padStart(2, '0')
+  return `${date.getFullYear()}-${pad(date.getMonth() + 1)}-${pad(date.getDate())}`
+}
+
+/** Local midnight of a YYYY-MM-DD day, `shiftDays` days later */
+function localMidnight(date: string, shiftDays = 0): Date {
+  const [year, month, day] = date.split('-').map(Number)
+  return new Date(year!, month! - 1, day! + shiftDays)
+}
+
+function formatDate(date: string) {
+  return localMidnight(date).toLocaleDateString('ru-RU')
+}
+
+let scheduledRequestId = 0
+
+async function loadScheduled() {
+  if (!range.value) return
+  // The month view shows whole weeks (Mon–Sun), so request the visible grid, not just the month
+  const start = localMidnight(range.value.start.date)
+  start.setDate(start.getDate() - ((start.getDay() + 6) % 7))
+  const end = localMidnight(range.value.end.date, 1)
+  end.setDate(end.getDate() + ((8 - end.getDay()) % 7))
+
+  const requestId = ++scheduledRequestId
+  loadingScheduled.value = true
+  const res = await issueStore.calendar({
+    from: start.toISOString(),
+    to: end.toISOString(),
+    projectId: currentProjectId.value,
+  })
+  if (requestId !== scheduledRequestId) return
+  loadingScheduled.value = false
+  scheduled.value = res?.list ?? []
+  truncated.value = res?.truncated ?? false
+}
+
+let unscheduledRequestId = 0
+
+async function loadUnscheduled(page = 1) {
+  const requestId = ++unscheduledRequestId
+  loadingUnscheduled.value = true
+  const res = await issueStore.list({
+    page,
+    limit: UNSCHEDULED_LIMIT,
+    text: search.value,
+    projectId: currentProjectId.value,
+    hasDueDate: false,
+  })
+  if (requestId !== unscheduledRequestId) return
+  loadingUnscheduled.value = false
+  unscheduled.value = page === 1 ? res.list : [...unscheduled.value, ...res.list]
+  unscheduledPage.value = page
+  unscheduledTotalPages.value = res.meta.totalPages
+  unscheduledTotal.value = res.meta.totalCount
+}
+
+function onRangeChange(value: CalendarRange) {
+  range.value = value
+  loadScheduled()
+}
+
+watch(currentProjectId, () => {
+  loadScheduled()
+  loadUnscheduled()
+})
+watchDebounced(search, () => loadUnscheduled(), { debounce: 300 })
+loadUnscheduled()
+
+async function setDueDate(issue: Issue, date: string | null) {
+  if (savingIds.value.includes(issue.id)) return
+  if (date && issue.dueDate && toLocalDate(new Date(issue.dueDate)) === date) return
+
+  savingIds.value.push(issue.id)
+  const updated = await issueStore.update(issue.id, {
+    dueDate: date ? localMidnight(date).toISOString() : null,
+  })
+  savingIds.value = savingIds.value.filter((id) => id !== issue.id)
+  if (!updated) return
+
+  const wasUnscheduled = unscheduled.value.some((el) => el.id === issue.id)
+  unscheduled.value = unscheduled.value.filter((el) => el.id !== issue.id)
+  scheduled.value = scheduled.value.filter((el) => el.id !== issue.id)
+
+  if (updated.dueDate) {
+    scheduled.value.push(updated)
+    if (wasUnscheduled) unscheduledTotal.value--
+  } else {
+    unscheduled.value.unshift(updated)
+    unscheduledTotal.value++
+  }
+}
+
+function findIssue(id: number) {
+  return unscheduled.value.find((el) => el.id === id) ?? scheduled.value.find((el) => el.id === id)
+}
+
+function onDragStart(e: DragEvent, issue: Issue) {
+  if (!e.dataTransfer) return
+  e.dataTransfer.effectAllowed = 'move'
+  e.dataTransfer.setData(DRAG_TYPE, String(issue.id))
+  e.dataTransfer.setData('text/plain', issue.key)
+}
+
+function onDragEnd() {
+  dragOverDate.value = null
+  dragOverPanel.value = false
+}
+
+function isIssueDrag(e: Event): e is DragEvent {
+  return e instanceof DragEvent && !!e.dataTransfer?.types.includes(DRAG_TYPE)
+}
+
+function onDayDragOver(e: Event, day: { date: string }) {
+  if (!isIssueDrag(e)) return
+  e.preventDefault()
+  dragOverDate.value = day.date
+}
+
+function onDayDrop(e: Event, day: { date: string }) {
+  dragOverDate.value = null
+  if (!isIssueDrag(e)) return
+  const issue = findIssue(Number(e.dataTransfer?.getData(DRAG_TYPE)))
+  if (issue) setDueDate(issue, day.date)
+}
+
+function onPanelDragOver(e: DragEvent) {
+  if (!isIssueDrag(e)) return
+  e.preventDefault()
+  dragOverPanel.value = true
+}
+
+function onPanelDrop(e: DragEvent) {
+  dragOverPanel.value = false
+  const id = Number(e.dataTransfer?.getData(DRAG_TYPE))
+  // Only calendar events can be dropped back to unschedule them
+  const issue = scheduled.value.find((el) => el.id === id)
+  if (issue) setDueDate(issue, null)
+}
+
+function onDayClick(_e: Event, day: { date: string }) {
+  selectedDate.value = selectedDate.value === day.date ? null : day.date
+}
+
+function onEventClick(e: Event, scope: { event: Partial<CalendarEvent> }) {
+  // Don't let the click reach the day cell and toggle the selection
+  e.stopPropagation()
+  if (scope.event.issue) router.push(`/issues/${scope.event.issue.key}`)
+}
+
+function goToday() {
+  focus.value = toLocalDate(new Date())
 }
 </script>
 
 <template>
-  <div>
-    <v-sheet height="600">
-      <v-calendar format="24hr" type="month" first-day-of-week="1" @change="getEvents" :events="events">
-        <template #day> aaaa </template>
-      </v-calendar>
-    </v-sheet>
+  <div class="calendar-layout">
+    <div class="d-flex flex-column ga-2 calendar-main">
+      <div class="d-flex align-center ga-2">
+        <v-btn density="comfortable" icon="mdi-chevron-left" @click="calendarRef?.prev()" />
+        <v-btn density="comfortable" icon="mdi-chevron-right" @click="calendarRef?.next()" />
+        <v-btn density="comfortable" @click="goToday">Today</v-btn>
+        <div class="text-h6 ml-2">{{ title }}</div>
+        <v-progress-circular v-if="loadingScheduled" indeterminate size="20" width="2" />
+        <v-spacer />
+        <v-chip v-if="truncated" color="warning" size="small" prepend-icon="mdi-alert">
+          Not all issues are shown
+        </v-chip>
+      </div>
+
+      <v-sheet class="flex-grow-1" border>
+        <v-calendar
+          ref="calendarRef"
+          v-model="focus"
+          type="month"
+          :weekdays="[1, 2, 3, 4, 5, 6, 0]"
+          :events="events"
+          event-text-color="white"
+          @change="onRangeChange"
+          @click:day="onDayClick"
+          @click:event="onEventClick"
+          @dragover:day="onDayDragOver"
+          @drop:day="onDayDrop"
+        >
+          <template #day-label="day">
+            <div class="d-flex justify-center">
+              <v-btn
+                icon
+                size="x-small"
+                :variant="selectedDate === day.date ? 'flat' : day.present ? 'outlined' : 'text'"
+                :color="selectedDate === day.date || day.present ? 'primary' : undefined"
+                @click.stop="onDayClick($event, day)"
+              >
+                {{ day.day }}
+              </v-btn>
+            </div>
+          </template>
+
+          <template #day="day">
+            <div
+              class="day-overlay"
+              :class="{
+                'day-overlay--selected': selectedDate === day.date,
+                'day-overlay--drop': dragOverDate === day.date,
+              }"
+            />
+          </template>
+
+          <template #event="{ event }">
+            <div
+              class="pl-1 text-truncate cursor-grab"
+              :class="{ 'opacity-50': savingIds.includes(event.issue.id) }"
+              :title="event.name"
+              draggable="true"
+              @dragstart.stop="onDragStart($event, event.issue)"
+              @dragend="onDragEnd"
+            >
+              <span
+                class="font-weight-bold"
+                :class="{ 'text-decoration-line-through': ['DONE', 'CANCELLED'].includes(event.issue.status) }"
+              >
+                {{ event.issue.key }}
+              </span>
+              {{ event.issue.title }}
+            </div>
+          </template>
+        </v-calendar>
+      </v-sheet>
+    </div>
+
+    <v-card
+      border
+      class="d-flex flex-column calendar-side"
+      :class="{ 'calendar-side--drop': dragOverPanel }"
+      @dragover="onPanelDragOver"
+      @dragleave.self="dragOverPanel = false"
+      @drop="onPanelDrop"
+    >
+      <v-card-title class="d-flex align-center ga-2 text-subtitle-1">
+        Unscheduled
+        <v-chip size="x-small">{{ unscheduledTotal }}</v-chip>
+      </v-card-title>
+
+      <div class="px-4 pb-2 d-flex flex-column ga-2">
+        <v-text-field v-model="search" placeholder="Search" prepend-inner-icon="mdi-magnify" clearable />
+        <div class="text-caption text-medium-emphasis d-flex align-center ga-1">
+          <template v-if="selectedDate">
+            <span>
+              Selected: <b>{{ formatDate(selectedDate) }}</b> — press + to schedule
+            </span>
+            <v-btn density="compact" size="x-small" icon="mdi-close" variant="text" @click="selectedDate = null" />
+          </template>
+          <span v-else>Drag an issue onto a day, or pick a day and press +</span>
+        </div>
+      </div>
+
+      <v-divider />
+
+      <div class="flex-grow-1 overflow-y-auto">
+        <v-list class="pa-0">
+          <v-list-item
+            v-for="issue in unscheduled"
+            :key="issue.id"
+            class="cursor-grab"
+            :class="{ 'opacity-50': savingIds.includes(issue.id) }"
+            draggable="true"
+            @dragstart="onDragStart($event, issue)"
+            @dragend="onDragEnd"
+          >
+            <template #prepend>
+              <v-icon icon="mdi-drag-vertical" size="small" class="mr-1" />
+            </template>
+            <v-list-item-title>
+              <router-link :to="`/issues/${issue.key}`" class="text-link font-weight-bold mr-1" draggable="false">
+                {{ issue.key }}
+              </router-link>
+              <span :title="issue.title">{{ issue.title }}</span>
+            </v-list-item-title>
+            <template #append>
+              <v-btn
+                density="compact"
+                icon="mdi-plus"
+                variant="text"
+                :disabled="!selectedDate"
+                :loading="savingIds.includes(issue.id)"
+                :title="selectedDate ? `Schedule for ${formatDate(selectedDate)}` : 'Pick a day on the calendar first'"
+                @click="selectedDate && setDueDate(issue, selectedDate)"
+              />
+            </template>
+          </v-list-item>
+        </v-list>
+
+        <div v-if="!loadingUnscheduled && !unscheduled.length" class="pa-4 text-center text-medium-emphasis">
+          No unscheduled issues
+        </div>
+
+        <div v-if="unscheduledPage < unscheduledTotalPages || loadingUnscheduled" class="d-flex justify-center pa-2">
+          <v-btn density="compact" :loading="loadingUnscheduled" @click="loadUnscheduled(unscheduledPage + 1)">
+            Load more
+          </v-btn>
+        </div>
+      </div>
+
+      <div v-if="dragOverPanel" class="text-caption text-center pa-2 text-primary">Drop here to remove the date</div>
+    </v-card>
   </div>
 </template>
-<style scoped lang="scss"></style>
+
+<style scoped lang="scss">
+.calendar-layout {
+  display: grid;
+  grid-template-columns: minmax(0, 1fr) 22rem;
+  gap: 16px;
+  height: calc(100vh - 140px);
+  min-height: 600px;
+}
+
+.calendar-main {
+  min-width: 0;
+}
+
+.calendar-side {
+  min-height: 0;
+  transition: border-color 0.15s;
+
+  &--drop {
+    border-color: rgb(var(--v-theme-primary)) !important;
+  }
+}
+
+.day-overlay {
+  position: absolute;
+  inset: 0;
+  pointer-events: none;
+
+  &--selected {
+    background: rgba(var(--v-theme-primary), 0.08);
+  }
+
+  &--drop {
+    background: rgba(var(--v-theme-primary), 0.18);
+    outline: 2px dashed rgb(var(--v-theme-primary));
+    outline-offset: -2px;
+  }
+}
+
+.cursor-grab {
+  cursor: grab;
+}
+
+@media (max-width: 960px) {
+  .calendar-layout {
+    grid-template-columns: 1fr;
+    height: auto;
+  }
+
+  .calendar-main {
+    min-height: 600px;
+  }
+
+  .calendar-side {
+    max-height: 60vh;
+  }
+}
+</style>