diff --git a/models/calendar/src/index.ts b/models/calendar/src/index.ts
index a727a9acf2..089e642814 100644
--- a/models/calendar/src/index.ts
+++ b/models/calendar/src/index.ts
@@ -50,8 +50,8 @@ import view, { createAction } from '@hcengineering/model-view'
 import workbench from '@hcengineering/model-workbench'
 import notification from '@hcengineering/notification'
 import setting from '@hcengineering/setting'
-import calendar from './plugin'
 import { AnyComponent } from '@hcengineering/ui'
+import calendar from './plugin'
 
 export * from '@hcengineering/calendar'
 export { calendarId } from '@hcengineering/calendar'
@@ -62,13 +62,16 @@ export const DOMAIN_CALENDAR = 'calendar' as Domain
 @Model(calendar.class.Calendar, core.class.Space)
 @UX(calendar.string.Calendar, calendar.icon.Calendar)
 export class TCalendar extends TSpaceWithStates implements Calendar {
-  @Prop(TypeString(), calendar.string.HideDetails)
-    hideDetails?: boolean
+  visibility!: 'public' | 'freeBusy' | 'private'
+
+  sync?: boolean
 }
 
 @Model(calendar.class.Event, core.class.AttachedDoc, DOMAIN_CALENDAR)
 @UX(calendar.string.Event, calendar.icon.Calendar)
 export class TEvent extends TAttachedDoc implements Event {
+  declare space: Ref<Calendar>
+
   eventId!: string
 
   @Prop(TypeString(), calendar.string.Title)
@@ -106,6 +109,8 @@ export class TEvent extends TAttachedDoc implements Event {
     externalParticipants?: string[]
 
   access!: 'freeBusyReader' | 'reader' | 'writer' | 'owner'
+
+  visibility?: 'public' | 'freeBusy' | 'private'
 }
 
 @Model(calendar.class.ReccuringEvent, calendar.class.Event)
@@ -174,7 +179,8 @@ export function createModel (builder: Builder): void {
       icon: calendar.component.CalendarIntegrationIcon,
       createComponent: calendar.component.IntegrationConnect,
       onDisconnect: calendar.handler.DisconnectHandler,
-      reconnectComponent: calendar.component.IntegrationConnect
+      reconnectComponent: calendar.component.IntegrationConnect,
+      configureComponent: calendar.component.IntegrationConfigure
     },
     calendar.integrationType.Calendar
   )
diff --git a/models/calendar/src/migration.ts b/models/calendar/src/migration.ts
index 38d63c2182..94019911f1 100644
--- a/models/calendar/src/migration.ts
+++ b/models/calendar/src/migration.ts
@@ -33,7 +33,8 @@ async function migrateCalendars (tx: TxOperations): Promise<void> {
           description: '',
           archived: false,
           private: false,
-          members: [user._id]
+          members: [user._id],
+          visibility: 'public'
         },
         `${user._id}_calendar` as Ref<Calendar>,
         undefined,
@@ -49,6 +50,11 @@ async function migrateCalendars (tx: TxOperations): Promise<void> {
   if (space !== undefined) {
     await tx.remove(space)
   }
+
+  const calendars = await tx.findAll(calendar.class.Calendar, { visibility: { $exists: false } })
+  for (const calendar of calendars) {
+    await tx.update(calendar, { visibility: 'public' })
+  }
 }
 
 async function fixEventDueDate (client: MigrationClient): Promise<void> {
diff --git a/models/calendar/src/plugin.ts b/models/calendar/src/plugin.ts
index 821b550e81..c4a62d7958 100644
--- a/models/calendar/src/plugin.ts
+++ b/models/calendar/src/plugin.ts
@@ -29,7 +29,8 @@ export default mergeIds(calendarId, calendar, {
     CreateCalendar: '' as AnyComponent,
     EventPresenter: '' as AnyComponent,
     CalendarIntegrationIcon: '' as AnyComponent,
-    CalendarEventPresenter: '' as AnyComponent
+    CalendarEventPresenter: '' as AnyComponent,
+    IntegrationConfigure: '' as AnyComponent
   },
   action: {
     SaveEventReminder: '' as Ref<Action>,
diff --git a/plugins/calendar-assets/lang/en.json b/plugins/calendar-assets/lang/en.json
index 2573d07702..df11f6063c 100644
--- a/plugins/calendar-assets/lang/en.json
+++ b/plugins/calendar-assets/lang/en.json
@@ -73,6 +73,8 @@
     "SundayShort": "Su",
     "OnUntil": "On",
     "Times": "{count, plural, one {time} other {times}}",
-    "AddParticipants": "Add participants"
+    "AddParticipants": "Add participants",
+    "Sync": "Synchronization",
+    "Busy": "Busy"
   }
 }
\ No newline at end of file
diff --git a/plugins/calendar-assets/lang/ru.json b/plugins/calendar-assets/lang/ru.json
index 1593d9a865..37f01da0c0 100644
--- a/plugins/calendar-assets/lang/ru.json
+++ b/plugins/calendar-assets/lang/ru.json
@@ -73,7 +73,8 @@
     "SundayShort": "Вс",
     "OnUntil": "До",
     "Times": "{count, plural, one {раз} few {раза} other {раз}}",
-    "AddParticipants": "Добавить участников"
-
+    "AddParticipants": "Добавить участников",
+    "Sync": "Синхронизация",
+    "Busy": "Занято"
   }
 }
\ No newline at end of file
diff --git a/plugins/calendar-resources/src/components/CalendarEventPresenter.svelte b/plugins/calendar-resources/src/components/CalendarEventPresenter.svelte
index 321b58eca3..d92b73d271 100644
--- a/plugins/calendar-resources/src/components/CalendarEventPresenter.svelte
+++ b/plugins/calendar-resources/src/components/CalendarEventPresenter.svelte
@@ -14,9 +14,11 @@
 -->
 <script lang="ts">
   import { Event } from '@hcengineering/calendar'
-  import { addZero } from '@hcengineering/ui'
+  import { Label, addZero } from '@hcengineering/ui'
+  import calendar from '../plugin'
 
   export let event: Event
+  export let hideDetails: boolean = false
   export let oneRow: boolean = false
   export let narrow: boolean = false
   export let size: { width: number; height: number }
@@ -30,7 +32,13 @@
 </script>
 
 {#if !narrow}
-  <b class="overflow-label">{event.title}</b>
+  {#if !hideDetails}
+    <b class="overflow-label">
+      {event.title}
+    </b>
+  {:else}
+    <span class="content-dark-color"><Label label={calendar.string.Busy} /></span>
+  {/if}
 {/if}
 {#if !oneRow}
   <span class="overflow-label text-sm">{getTime(startDate)}-{getTime(endDate)}</span>
diff --git a/plugins/calendar-resources/src/components/CalendarView.svelte b/plugins/calendar-resources/src/components/CalendarView.svelte
index 09b839d8fa..b7bc15c7f5 100644
--- a/plugins/calendar-resources/src/components/CalendarView.svelte
+++ b/plugins/calendar-resources/src/components/CalendarView.svelte
@@ -39,7 +39,7 @@
     getMonday,
     showPopup
   } from '@hcengineering/ui'
-  import { CalendarMode, DayCalendar } from '../index'
+  import { CalendarMode, DayCalendar, calendarStore, hidePrivateEvents } from '../index'
   import calendar from '../plugin'
   import Day from './Day.svelte'
 
@@ -66,6 +66,7 @@
   let selectedDate: Date = new Date()
 
   let raw: Event[] = []
+  let visible: Event[] = []
   let objects: Event[] = []
 
   function getFrom (date: Date, mode: CalendarMode): Timestamp {
@@ -116,7 +117,7 @@
 
   let calendars: Calendar[] = []
 
-  calendarsQuery.query(calendar.class.Calendar, { createdBy: me._id }, (res) => {
+  calendarsQuery.query(calendar.class.Calendar, { members: me._id }, (res) => {
     calendars = res
   })
 
@@ -138,7 +139,8 @@
     )
   }
   $: update(_class, query, calendars, options)
-  $: objects = getAllEvents(raw, from, to)
+  $: visible = hidePrivateEvents(raw, $calendarStore)
+  $: objects = getAllEvents(visible, from, to)
 
   function inRange (start: Date, end: Date, startPeriod: Date, period: 'day' | 'hour'): boolean {
     const endPeriod =
@@ -242,7 +244,7 @@
         current.dueDate = new Date(e.detail.date).setMinutes(new Date(e.detail.date).getMinutes() + 30)
       } else {
         const me = getCurrentAccount() as PersonAccount
-        raw.push({
+        const temp: Event = {
           _id: dragItemId,
           allDay: false,
           eventId: generateEventId(),
@@ -253,13 +255,14 @@
           attachedToClass: dragItem._class,
           _class: dragEventClass,
           collection: 'events',
-          space: dragItem.space,
+          space: `${me._id}_calendar` as Ref<Calendar>,
           modifiedBy: me._id,
           participants: [me.person],
           modifiedOn: Date.now(),
           date: e.detail.date.getTime(),
           dueDate: new Date(e.detail.date).setMinutes(new Date(e.detail.date).getMinutes() + 30)
-        })
+        }
+        raw.push(temp)
       }
       raw = raw
     }
@@ -270,7 +273,8 @@
   function clear (dragItem: Doc | undefined) {
     if (dragItem === undefined) {
       raw = raw.filter((p) => p._id !== dragItemId)
-      objects = getAllEvents(raw, from, to)
+      visible = hidePrivateEvents(raw, $calendarStore)
+      objects = getAllEvents(visible, from, to)
     }
   }
 
diff --git a/plugins/calendar-resources/src/components/EditEvent.svelte b/plugins/calendar-resources/src/components/EditEvent.svelte
index 754f8e1b05..ae4165f34c 100644
--- a/plugins/calendar-resources/src/components/EditEvent.svelte
+++ b/plugins/calendar-resources/src/components/EditEvent.svelte
@@ -20,7 +20,7 @@
   import { Button, CheckBox, DAY, EditBox, Icon, IconClose, Label, closePopup, showPopup } from '@hcengineering/ui'
   import { createEventDispatcher } from 'svelte'
   import calendar from '../plugin'
-  import { saveUTC } from '../utils'
+  import { isReadOnly, saveUTC } from '../utils'
   import EventParticipants from './EventParticipants.svelte'
   import EventTimeEditor from './EventTimeEditor.svelte'
   import RRulePresenter from './RRulePresenter.svelte'
@@ -29,6 +29,8 @@
 
   export let object: Event
 
+  $: readOnly = isReadOnly(object)
+
   let title = object.title
 
   const defaultDuration = 60 * 60 * 1000
@@ -54,6 +56,9 @@
   }
 
   async function saveEvent () {
+    if (readOnly) {
+      return
+    }
     const update: DocumentUpdate<Event> = {}
     if (object.title !== title) {
       update.title = title.trim()
@@ -97,6 +102,9 @@
   }
 
   function setRecurrance () {
+    if (readOnly) {
+      return
+    }
     showPopup(ReccurancePopup, { rules }, undefined, (res) => {
       if (res) {
         rules = res
@@ -196,7 +204,7 @@
 <div class="container">
   <div class="header flex-between">
     {#if object.attachedTo === calendar.ids.NoAttached}
-      <EditBox bind:value={title} placeholder={calendar.string.NewEvent} />
+      <EditBox bind:value={title} placeholder={calendar.string.NewEvent} disabled={readOnly} />
     {:else}
       <div />
     {/if}
@@ -213,7 +221,7 @@
     />
   </div>
   <div class="time">
-    <EventTimeEditor {allDay} bind:startDate bind:dueDate />
+    <EventTimeEditor {allDay} bind:startDate bind:dueDate disabled={readOnly} />
     <div>
       {#if !allDay && rules.length === 0}
         <div class="flex-row-center flex-gap-3 ext">
@@ -232,7 +240,7 @@
       {:else}
         <div>
           <div class="flex-row-center flex-gap-2 mt-1">
-            <CheckBox bind:checked={allDay} accented on:value={allDayChangeHandler} />
+            <CheckBox bind:checked={allDay} accented on:value={allDayChangeHandler} readonly={readOnly} />
             <Label label={calendar.string.AllDay} />
           </div>
           <div class="flex-row-center flex-gap-2 mt-1">
@@ -255,24 +263,19 @@
   </div>
   <div class="divider" />
   <div>
-    <EventParticipants bind:participants bind:externalParticipants />
+    <EventParticipants bind:participants bind:externalParticipants disabled={readOnly} />
   </div>
   <div class="divider" />
   <div class="block">
     <div class="flex-row-center flex-gap-2">
       <Icon icon={calendar.icon.Description} size="small" />
-      <EditBox bind:value={description} placeholder={calendar.string.Description} />
+      <EditBox bind:value={description} placeholder={calendar.string.Description} disabled={readOnly} />
     </div>
   </div>
   <div class="divider" />
   <div class="flex-between pool">
     <div />
-    <Button
-      kind="accented"
-      label={presentation.string.Save}
-      on:click={saveEvent}
-      disabled={title === '' && object.attachedTo === calendar.ids.NoAttached}
-    />
+    <Button kind="accented" label={presentation.string.Save} disabled={readOnly} on:click={saveEvent} />
   </div>
 </div>
 
diff --git a/plugins/calendar-resources/src/components/EventElement.svelte b/plugins/calendar-resources/src/components/EventElement.svelte
index 4fc3061b5e..d5cc7c4973 100644
--- a/plugins/calendar-resources/src/components/EventElement.svelte
+++ b/plugins/calendar-resources/src/components/EventElement.svelte
@@ -25,9 +25,10 @@
     tooltip
   } from '@hcengineering/ui'
   import view, { ObjectEditor } from '@hcengineering/view'
-  import { createEventDispatcher } from 'svelte'
-  import EventPresenter from './EventPresenter.svelte'
   import { Menu } from '@hcengineering/view-resources'
+  import { createEventDispatcher } from 'svelte'
+  import { calendarStore, isReadOnly, isVisible } from '../utils'
+  import EventPresenter from './EventPresenter.svelte'
 
   export let event: Event
   export let hourHeight: number
@@ -38,9 +39,11 @@
   $: empty = size.width < 44
 
   function click () {
-    const editor = hierarchy.classHierarchyMixin<Doc, ObjectEditor>(event._class, view.mixin.ObjectEditor)
-    if (editor?.editor !== undefined) {
-      showPopup(editor.editor, { object: event })
+    if (visible) {
+      const editor = hierarchy.classHierarchyMixin<Doc, ObjectEditor>(event._class, view.mixin.ObjectEditor)
+      if (editor?.editor !== undefined) {
+        showPopup(editor.editor, { object: event })
+      }
     }
   }
 
@@ -58,6 +61,7 @@
   $: fontSize = $deviceOptionsStore.fontSize
 
   function dragStart (e: DragEvent) {
+    if (readOnly) return
     if (event.allDay) return
     originDate = event.date
     originDueDate = event.dueDate
@@ -87,6 +91,7 @@
   let dragDirection: 'bottom' | 'mid' | 'top' | undefined
 
   function drag (e: DragEvent) {
+    if (readOnly) return
     if (event.allDay) return
     if (dragInitY !== undefined) {
       const diff = Math.floor((e.y - dragInitY) / pixelPer15Min)
@@ -135,6 +140,9 @@
     ev.preventDefault()
     showPopup(Menu, { object: event }, getEventPositionElement(ev))
   }
+
+  $: visible = isVisible(event, $calendarStore)
+  $: readOnly = isReadOnly(event)
 </script>
 
 {#if event}
@@ -145,7 +153,7 @@
     class:oneRow
     class:empty
     draggable={!event.allDay}
-    use:tooltip={{ component: EventPresenter, props: { value: event } }}
+    use:tooltip={{ component: EventPresenter, props: { value: event, hideDetails: !visible } }}
     on:click|stopPropagation={click}
     on:contextmenu={showMenu}
     on:dragstart={dragStart}
@@ -154,7 +162,7 @@
     on:drop
   >
     {#if !empty && presenter?.presenter}
-      <Component is={presenter.presenter} props={{ event, narrow, oneRow }} />
+      <Component is={presenter.presenter} props={{ event, narrow, oneRow, hideDetails: !visible }} />
     {/if}
   </div>
 {/if}
diff --git a/plugins/calendar-resources/src/components/EventParticipants.svelte b/plugins/calendar-resources/src/components/EventParticipants.svelte
index 5afb8132d1..f973fb7729 100644
--- a/plugins/calendar-resources/src/components/EventParticipants.svelte
+++ b/plugins/calendar-resources/src/components/EventParticipants.svelte
@@ -22,6 +22,7 @@
 
   export let participants: Ref<Person>[]
   export let externalParticipants: string[]
+  export let disabled: boolean = false
 
   $: placeholder =
     participants.length > 0 || externalParticipants.length > 0
diff --git a/plugins/calendar-resources/src/components/EventPresenter.svelte b/plugins/calendar-resources/src/components/EventPresenter.svelte
index 41b4377aa2..000b7b5a59 100644
--- a/plugins/calendar-resources/src/components/EventPresenter.svelte
+++ b/plugins/calendar-resources/src/components/EventPresenter.svelte
@@ -14,10 +14,11 @@
 -->
 <script lang="ts">
   import { Event } from '@hcengineering/calendar'
-  import { DatePresenter, DateTimeRangePresenter, showPopup } from '@hcengineering/ui'
+  import { DatePresenter, DateTimeRangePresenter, Label, showPopup } from '@hcengineering/ui'
   import calendar from '../plugin'
 
   export let value: Event
+  export let hideDetails: boolean = false
   export let inline: boolean = false
 
   function click (): void {
@@ -29,7 +30,11 @@
 <div class="antiSelect w-full cursor-pointer flex-center flex-between" on:click={click}>
   {#if value}
     <div class="mr-4">
-      {value.title}
+      {#if !hideDetails}
+        {value.title}
+      {:else}
+        <Label label={calendar.string.Busy} />
+      {/if}
     </div>
     {#if !inline}
       {#if value.allDay}
diff --git a/plugins/calendar-resources/src/components/EventTimeEditor.svelte b/plugins/calendar-resources/src/components/EventTimeEditor.svelte
index f5265d22fd..22a7645180 100644
--- a/plugins/calendar-resources/src/components/EventTimeEditor.svelte
+++ b/plugins/calendar-resources/src/components/EventTimeEditor.svelte
@@ -20,6 +20,7 @@
   export let startDate: number
   export let dueDate: number
   export let allDay: boolean
+  export let disabled: boolean = false
 
   $: sameDate = areDatesEqual(new Date(startDate), new Date(dueDate))
 
@@ -46,7 +47,7 @@
 <div class="flex-row-center flex-gap-1 mt-2 mb-2">
   <Icon icon={calendar.icon.Watch} size="small" />
   {#if sameDate}
-    <DateEditor bind:date={startDate} direction="horizontal" withoutTime={allDay} on:update={dateChange} />
+    <DateEditor bind:date={startDate} direction="horizontal" withoutTime={allDay} on:update={dateChange} {disabled} />
     <div class="content-dark-color">
       <IconArrowRight size="small" />
     </div>
@@ -55,13 +56,14 @@
       direction="horizontal"
       withoutTime={allDay}
       showDate={false}
+      {disabled}
       on:update={dueChange}
     />
   {:else}
-    <DateEditor bind:date={startDate} direction="vertical" withoutTime={allDay} on:update={dateChange} />
+    <DateEditor bind:date={startDate} direction="vertical" withoutTime={allDay} on:update={dateChange} {disabled} />
     <div class="content-dark-color">
       <IconArrowRight size="small" />
     </div>
-    <DateEditor bind:date={dueDate} direction="vertical" withoutTime={allDay} on:update={dueChange} />
+    <DateEditor bind:date={dueDate} direction="vertical" withoutTime={allDay} on:update={dueChange} {disabled} />
   {/if}
 </div>
diff --git a/plugins/calendar-resources/src/components/IntegrationConfigure.svelte b/plugins/calendar-resources/src/components/IntegrationConfigure.svelte
new file mode 100644
index 0000000000..6526e50502
--- /dev/null
+++ b/plugins/calendar-resources/src/components/IntegrationConfigure.svelte
@@ -0,0 +1,71 @@
+<!--
+// Copyright © 2023 Hardcore Engineering Inc.
+//
+// Licensed under the Eclipse Public License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License. You may
+// obtain a copy of the License at https://www.eclipse.org/legal/epl-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//
+// See the License for the specific language governing permissions and
+// limitations under the License.
+-->
+<script lang="ts">
+  import { Calendar } from '@hcengineering/calendar'
+  import { getCurrentAccount } from '@hcengineering/core'
+  import presentation, { Card, createQuery, getClient } from '@hcengineering/presentation'
+  import { Grid, Label, Toggle } from '@hcengineering/ui'
+  import { createEventDispatcher } from 'svelte'
+  import calendar from '../plugin'
+
+  const client = getClient()
+
+  let calendars: Calendar[] = []
+  const query = createQuery()
+  query.query(
+    calendar.class.Calendar,
+    {
+      createdBy: getCurrentAccount()._id
+    },
+    (res) => (calendars = res)
+  )
+
+  async function update (calendar: Calendar, value: boolean) {
+    await client.update(calendar, {
+      sync: value
+    })
+  }
+
+  const dispatch = createEventDispatcher()
+</script>
+
+<Card
+  label={calendar.string.Calendars}
+  okAction={() => {
+    dispatch('close')
+  }}
+  canSave={true}
+  fullSize
+  okLabel={presentation.string.Ok}
+  on:close={() => dispatch('close')}
+  on:changeContent
+>
+  <div style="width: 25rem;">
+    <Grid rowGap={1}>
+      <div>
+        <Label label={calendar.string.Calendar} />
+      </div>
+      <div>
+        <Label label={calendar.string.Sync} />
+      </div>
+      {#each calendars as calendar}
+        <div>{calendar.name}</div>
+        <div>
+          <Toggle bind:on={calendar.sync} on:change={(res) => update(calendar, res.detail)} />
+        </div>
+      {/each}
+    </Grid>
+  </div>
+</Card>
diff --git a/plugins/calendar-resources/src/index.ts b/plugins/calendar-resources/src/index.ts
index 42a30938a9..7a1bfe0a1d 100644
--- a/plugins/calendar-resources/src/index.ts
+++ b/plugins/calendar-resources/src/index.ts
@@ -34,12 +34,15 @@ import CalendarIntegrationIcon from './components/icons/Calendar.svelte'
 import EventElement from './components/EventElement.svelte'
 import CalendarEventPresenter from './components/CalendarEventPresenter.svelte'
 import DayCalendar from './components/DayCalendar.svelte'
+import IntegrationConfigure from './components/IntegrationConfigure.svelte'
 import calendar from './plugin'
 import contact from '@hcengineering/contact'
 import { deleteObjects } from '@hcengineering/view-resources'
 
 export { EventElement, CalendarView, DayCalendar }
 
+export * from './utils'
+
 async function saveEventReminder (object: Doc): Promise<void> {
   showPopup(SaveEventReminder, { objectId: object._id, objectClass: object._class })
 }
@@ -70,7 +73,8 @@ async function deleteRecHandler (res: any, object: ReccuringInstance): Promise<v
         rdate: object.rdate,
         rules: object.rules,
         exdate: object.exdate,
-        access: 'owner'
+        visibility: object.visibility,
+        access: object.access
       },
       object._id
     )
@@ -152,7 +156,8 @@ export default async (): Promise<Resources> => ({
     CreateEvent,
     IntegrationConnect,
     CalendarIntegrationIcon,
-    CalendarEventPresenter
+    CalendarEventPresenter,
+    IntegrationConfigure
   },
   activity: {
     ReminderViewlet
diff --git a/plugins/calendar-resources/src/plugin.ts b/plugins/calendar-resources/src/plugin.ts
index c6e6c612a0..be79458a7b 100644
--- a/plugins/calendar-resources/src/plugin.ts
+++ b/plugins/calendar-resources/src/plugin.ts
@@ -75,6 +75,8 @@ export default mergeIds(calendarId, calendar, {
     SaturdayShort: '' as IntlString,
     SundayShort: '' as IntlString,
     Times: '' as IntlString,
-    AddParticipants: '' as IntlString
+    AddParticipants: '' as IntlString,
+    Sync: '' as IntlString,
+    Busy: '' as IntlString
   }
 })
diff --git a/plugins/calendar-resources/src/utils.ts b/plugins/calendar-resources/src/utils.ts
index 570c0c0fd9..41f3d37241 100644
--- a/plugins/calendar-resources/src/utils.ts
+++ b/plugins/calendar-resources/src/utils.ts
@@ -1,4 +1,8 @@
-import { Timestamp } from '@hcengineering/core'
+import { Calendar, Event } from '@hcengineering/calendar'
+import { IdMap, Timestamp, getCurrentAccount, toIdMap } from '@hcengineering/core'
+import { createQuery, getClient } from '@hcengineering/presentation'
+import { writable } from 'svelte/store'
+import calendar from './plugin'
 
 export function saveUTC (date: Timestamp): Timestamp {
   const utcdate = new Date(date)
@@ -12,3 +16,63 @@ export function saveUTC (date: Timestamp): Timestamp {
     utcdate.getMilliseconds()
   )
 }
+
+export function hidePrivateEvents (events: Event[], calendars: IdMap<Calendar>): Event[] {
+  const me = getCurrentAccount()._id
+  const res: Event[] = []
+  for (const event of events) {
+    if ((event.createdBy ?? event.modifiedBy) === me) {
+      res.push(event)
+    } else {
+      if (event.visibility !== undefined) {
+        if (event.visibility !== 'private') {
+          res.push(event)
+        }
+      } else {
+        const space = calendars.get(event.space)
+        if (space != null && space.visibility !== 'private') {
+          res.push(event)
+        }
+      }
+    }
+  }
+  return res
+}
+
+export function isReadOnly (value: Event): boolean {
+  const me = getCurrentAccount()._id
+  if (value.createdBy !== me) return true
+  if (['owner', 'writer'].includes(value.access)) return false
+  return true
+}
+
+export function isVisible (value: Event, calendars: IdMap<Calendar>): boolean {
+  const me = getCurrentAccount()._id
+  if (value.createdBy === me) return true
+  if (value.visibility === 'freeBusy') {
+    return false
+  }
+  const space = calendars.get(value.space)
+  if (space == null) {
+    return true
+  } else {
+    return space.visibility === 'public'
+  }
+}
+
+export const calendarStore = writable<IdMap<Calendar>>(new Map())
+
+function fillStores (): void {
+  const client = getClient()
+
+  if (client !== undefined) {
+    const query = createQuery(true)
+    query.query(calendar.class.Calendar, {}, (res) => {
+      calendarStore.set(toIdMap(res))
+    })
+  } else {
+    setTimeout(() => fillStores(), 50)
+  }
+}
+
+fillStores()
diff --git a/plugins/calendar/src/index.ts b/plugins/calendar/src/index.ts
index d7e3976257..7789aeb12e 100644
--- a/plugins/calendar/src/index.ts
+++ b/plugins/calendar/src/index.ts
@@ -22,7 +22,10 @@ import { AnyComponent } from '@hcengineering/ui'
 /**
  * @public
  */
-export interface Calendar extends Space {}
+export interface Calendar extends Space {
+  visibility: 'public' | 'freeBusy' | 'private'
+  sync?: boolean
+}
 
 /**
  * @public
@@ -58,6 +61,7 @@ export interface ReccuringEvent extends Event {
  * @public
  */
 export interface Event extends AttachedDoc {
+  space: Ref<Calendar>
   eventId: string
   title: string
   description: Markup
@@ -80,6 +84,8 @@ export interface Event extends AttachedDoc {
 
   reminders?: Timestamp[]
 
+  visibility?: 'public' | 'freeBusy' | 'private'
+
   access: 'freeBusyReader' | 'reader' | 'writer' | 'owner'
 }
 
@@ -132,7 +138,7 @@ const calendarPlugin = plugin(calendarId, {
   },
   space: {
     // deprecated
-    PersonalEvents: '' as Ref<Space>
+    PersonalEvents: '' as Ref<Calendar>
   },
   app: {
     Calendar: '' as Ref<Doc>
diff --git a/server-plugins/calendar-resources/src/index.ts b/server-plugins/calendar-resources/src/index.ts
index c1beeb9cea..a09695c799 100644
--- a/server-plugins/calendar-resources/src/index.ts
+++ b/server-plugins/calendar-resources/src/index.ts
@@ -94,7 +94,8 @@ export async function OnPersonAccountCreate (tx: Tx, control: TriggerControl): P
       description: '',
       archived: false,
       private: false,
-      members: [user._id]
+      members: [user._id],
+      visibility: 'public'
     },
     `${user._id}_calendar` as Ref<Calendar>,
     undefined,
@@ -108,11 +109,10 @@ async function onEventCreate (tx: Tx, control: TriggerControl): Promise<Tx[]> {
   const ev = TxProcessor.createDoc2Doc(ctx)
 
   const res: Tx[] = []
-  const accounts = await control.modelDb.findAll(contact.class.PersonAccount, {})
-  const participants = accounts.filter(
-    (p) => (p._id !== ev.createdBy ?? ev.modifiedBy) && ev.participants.includes(p.person)
-  )
-  for (const acc of participants) {
+  for (const participant of ev.participants) {
+    const acc = (await control.modelDb.findAll(contact.class.PersonAccount, { person: participant }))[0]
+    if (acc === undefined) continue
+    if (acc._id === ev.createdBy ?? ev.modifiedBy) continue
     const { _id, _class, space, modifiedBy, modifiedOn, ...data } = ev
     const innerTx = control.txFactory.createTxCreateDoc(_class, `${acc._id}_calendar` as Ref<Calendar>, {
       ...data,