Update Event calendar.event.update

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Scope: calendar

Who can execute the method: any user

This method updates an existing event.

Method Parameters

Required parameters are marked with *

Name `type`	Description
id* `integer`	Event identifier. You can obtain the identifier using the calendar.event.get or calendar.event.get.nearest methods.
type* `string`	Calendar type: `user` — user calendar `group` — group calendar `company_calendar` — company calendar
ownerId* `integer`	Calendar owner identifier. For the company calendar, the `ownerId` parameter is `0`.
from `datetime`\|`date`	Start date and time of the event. You can specify the date without time. To do this, pass the value `Y` in the `skip_time` parameter.
to `datetime`\|`date`	End date of the event. You can specify the date without time. To do this, pass the value `Y` in the `skip_time` parameter.
from_ts `integer`	Date and time in timestamp format. Can be used instead of the `from` parameter.
to_ts `integer`	Date and time in timestamp format. Can be used instead of the `to` parameter.
section `integer`	Calendar identifier.
name `string`	Event name.
skip_time `string`	Pass the date value without time in the `from` and `to` parameters. Possible values: `Y` — use only the date `N` — use date and time Date format according to ISO-8601 standard.
timezone_from `string`	Timezone of the start date and time of the event. Default is the current user's timezone. The value should be passed as a string, for example, `Europe/Riga`. Timezone handling features
timezone_to `string`	Timezone of the end date and time of the event. Default value is the current user's timezone. The value should be passed as a string, for example, `Europe/Riga`. Timezone handling features
description `text`	Event description.
color `string`	Background color of the event. The `#` symbol in the color must be passed in unicode format — `%23`.
text_color `string`	Text color of the event. The `#` symbol in the color must be passed in unicode format — `%23`.
accessibility `string`	Availability during the event time: `busy` — busy `absent` — absent `quest` — tentative `free` — free
importance `string`	Event importance: `high` — high `normal` — medium `low` — low
private_event `string`	Mark indicating that the event is private. Possible values: `Y` — private `N` — not private
recurrence_mode `string`	Parameter for partial editing of a recurring event. Possible values: `this` — changes apply only to the current event. Must specify `current_date_from`. `next` — changes apply to the current and all following events. Must specify `current_date_from`. `all` — changes apply to all events in the recurrence chain.
current_date_from `date`	Date of the current event for partial editing of a recurring event. Required only for `recurrence_mode` with values `this` or `next`.
rrule `object`	Recurrence of the event in the form of an object according to the iCalendar standard. The structure is described below.
is_meeting `string`	Indicator of a meeting with event participants. Possible values: `Y` — meeting with participants `N` — meeting without participants For a meeting with participants, pass the list of participants in `attendees`.
location `string`	Location.
remind `array`	Array of objects describing reminders for the event. The structure is described below.
attendees `array`	List of participant identifiers for the event. If you pass `is_meeting = Y` and do not pass `attendees`, the attendee list will be cleared. If you do not pass `is_meeting`, the current attendee list will be retained
host `integer`	Event organizer identifier. Pass this parameter only if the meeting is updated by someone other than the organizer. In this case, specify the identifier of the current organizer. If you do not pass the parameter or pass another user's identifier, the method returns the `Access denied` error. You can retrieve the current organizer identifier in the response of the calendar.event.getbyid and calendar.event.get methods in the `MEETING_HOST` field. You cannot use this parameter to change the organizer of an existing event. To change the organizer, delete the event using calendar.event.delete and create a new one using calendar.event.add on behalf of the required organizer
meeting `object`	Object with meeting parameters. The structure is described below.
crm_fields `array`	Array of CRM object identifiers to link to the event. To link objects, list their identifiers with prefixes: `CO_` — company `C_` — contact `L_` — lead `D_` — deal.

Timezone Handling Features

When working with event dates and times, you can use two approaches:

Full date format with timezone.

Use the ISO-8601 format with timezone specified in the from and to parameters:
- 2025-03-20T15:00:00+02:00 — with offset
- 2025-08-05T10:00:00+11:00 — with offset
- 2025-08-04T23:00:00Z — with UTC specified
The timezone_from and timezone_to parameters are ignored since the timezone is already specified in the date.
Simple date format with separate timezone parameters.

Use the simple format in the from and to parameters:
- 2025-03-20 15:00:00
- 2025-08-05 10:00:00
- 2025-08-05T10:00:00
Specify the timezone in the timezone_from and timezone_to parameters:
- Europe/Riga
- America/New_York
- Asia/Tokyo
If only timezone_from is specified, its value will be used for timezone_to.

Priority of timezone parameter processing:

Highest priority. If the from and to parameters are specified in full format with timezone, the timezone_from and timezone_to parameters are ignored.
Medium priority. If a simple date format is used and timezone_from and timezone_to parameters are specified, they are used.
Lowest priority. If the date format is simple and timezone parameters are not specified, the current user's timezone is used.

rrule Parameter

Name `type`	Description
FREQ `string`	Recurrence frequency `DAILY` — daily `WEEKLY` — weekly `MONTHLY` — monthly `YEARLY` — yearly
COUNT `integer`	Number of recurrences.
INTERVAL `integer`	Interval between recurrences.
BYDAY `array`	Days of the week `SU` — Sunday `MO` — Monday `TU` — Tuesday `WE` — Wednesday `TH` — Thursday `FR` — Friday `SA` — Saturday.
UNTIL `date`	End date of recurrences.

remind Parameter

Name
type

Description

type
string

Time type of reminder

min — minutes
hour – hours
day — days.

count
integer

Numerical value of the time interval.

meeting Parameter

Name `type`	Description
notify `boolean`	Flag for notification of confirmation or refusal from participants.
reinvite `boolean`	Flag for requesting re-confirmation of participation when editing the event.
allow_invite `boolean`	Flag allowing participants to invite others to the event.
hide_guests `boolean`	Flag for hiding the list of participants.

Code Examples

How to Use Examples in Documentation

cURL (Webhook)

cURL (OAuth)

JS (TS)

JS (UMD)

Python

PHP

BX24.js

PHP CRest

curl -X POST \
        -H "Content-Type: application/json" \
        -H "Accept: application/json" \
        -d '{"id":699,"type":"user","ownerId":2,"name":"Changed Event Name","description":"New description for event","from":"2024-06-17","to":"2024-06-17","skip_time":"Y","section":5,"color":"#9cbe1c","text_color":"#283033","accessibility":"free","importance":"normal","is_meeting":"Y","private_event":"Y","recurrence_mode":"next","current_date_from":"2024-12-04","remind":[{"type":"min","count":10}],"location":"London","attendees":[1,2,3],"meeting":{"notify":true,"reinvite":false,"allow_invite":false,"hide_guests":false},"rrule":{"FREQ":"WEEKLY","BYDAY":["MO","WE"],"COUNT":10,"INTERVAL":1},"crm_fields":["C_5","L_11"]}' \
        https://**put_your_bitrix24_address**/rest/**put_your_user_id_here**/**put_your_webhook_here**/calendar.event.update

curl -X POST \
        -H "Content-Type: application/json" \
        -H "Accept: application/json" \
        -d '{"id":699,"type":"user","ownerId":2,"name":"Changed Event Name","description":"New description for event","from":"2024-06-17","to":"2024-06-17","skip_time":"Y","section":5,"color":"#9cbe1c","text_color":"#283033","accessibility":"free","importance":"normal","is_meeting":"Y","private_event":"Y","recurrence_mode":"next","current_date_from":"2024-12-04","remind":[{"type":"min","count":10}],"location":"London","attendees":[1,2,3],"meeting":{"notify":true,"reinvite":false,"allow_invite":false,"hide_guests":false},"rrule":{"FREQ":"WEEKLY","BYDAY":["MO","WE"],"COUNT":10,"INTERVAL":1},"crm_fields":["C_5","L_11"],"auth":"**put_access_token_here**"}' \
        https://**put_your_bitrix24_address**/rest/calendar.event.update

// This snippet is an ES module: top-level await requires type="module" or a bundler.
        // $b24 is an already-initialized SDK instance (see the SDK "Get started" guide).
        import { Text } from '@bitrix24/b24jssdk'
        import type { B24Frame } from '@bitrix24/b24jssdk'
        
        declare const $b24: B24Frame
        
        // Shape of the payload returned in result (match the "response handling" section of the page)
        type CalendarEventUpdateResult =
          | number
          | {
              originalDate: string
              originalDavXmlId: string
              instanceTz: string
              recEventId: number
              id: number
            }
        
        try {
          const response = await $b24.actions.v2.call.make<CalendarEventUpdateResult>({
            method: 'calendar.event.update',
            params: {
              id: 699,
              type: 'user',
              ownerId: 2,
              name: 'Changed Event Name',
              description: 'New description for event',
              from: '2024-06-17',
              to: '2024-06-17',
              skip_time: 'Y',
              section: 5,
              color: '#9cbe1c',
              text_color: '#283033',
              accessibility: 'free',
              importance: 'normal',
              is_meeting: 'Y',
              private_event: 'Y',
              recurrence_mode: 'next',
              current_date_from: '2024-12-04',
              remind: [
                {
                  type: 'min',
                  count: 10,
                },
              ],
              location: 'London',
              attendees: [1, 2, 3],
              meeting: {
                notify: true,
                reinvite: false,
                allow_invite: false,
                hide_guests: false,
              },
              rrule: {
                FREQ: 'WEEKLY',
                BYDAY: ['MO', 'WE'],
                COUNT: 10,
                INTERVAL: 1,
              },
              crm_fields: ['C_5', 'L_11'],
            },
            requestId: Text.getUuidRfc4122()
          })
        
          // The payload is available only on a successful response
          if (!response.isSuccess) {
            console.error(response.getErrorMessages().join('; '))
          } else {
            const result = response.getData()!.result
            console.info('Updated calendar event:', result)
          }
        } catch (error) {
          // Thrown on transport or SDK failures (AjaxError, SdkError, etc.)
          console.error(error)
        }

<!-- Load the SDK (UMD build); it is exposed as the global B24Js -->
        <script src="https://unpkg.com/@bitrix24/b24jssdk@1/dist/umd/index.min.js"></script>
        <script>
          async function updateCalendarEvent() {
            try {
              // Initialize the SDK inside a Bitrix24 frame
              const $b24 = await B24Js.initializeB24Frame()
        
              const response = await $b24.actions.v2.call.make({
                method: 'calendar.event.update',
                params: {
                  id: 699,
                  type: 'user',
                  ownerId: 2,
                  name: 'Changed Event Name',
                  description: 'New description for event',
                  from: '2024-06-17',
                  to: '2024-06-17',
                  skip_time: 'Y',
                  section: 5,
                  color: '#9cbe1c',
                  text_color: '#283033',
                  accessibility: 'free',
                  importance: 'normal',
                  is_meeting: 'Y',
                  private_event: 'Y',
                  recurrence_mode: 'next',
                  current_date_from: '2024-12-04',
                  remind: [
                    {
                      type: 'min',
                      count: 10,
                    },
                  ],
                  location: 'London',
                  attendees: [1, 2, 3],
                  meeting: {
                    notify: true,
                    reinvite: false,
                    allow_invite: false,
                    hide_guests: false,
                  },
                  rrule: {
                    FREQ: 'WEEKLY',
                    BYDAY: ['MO', 'WE'],
                    COUNT: 10,
                    INTERVAL: 1,
                  },
                  crm_fields: ['C_5', 'L_11'],
                },
                requestId: B24Js.Text.getUuidRfc4122()
              })
        
              // The payload is available only on a successful response
              if (!response.isSuccess) {
                console.error(response.getErrorMessages().join('; '))
                return
              }
        
              const result = response.getData().result
              console.info('Updated calendar event:', result)
            } catch (error) {
              // Thrown on transport or SDK failures (AjaxError, SdkError, etc.)
              console.error(error)
            }
          }
        
          document.addEventListener('DOMContentLoaded', updateCalendarEvent)
        </script>

from b24pysdk.errors import BitrixAPIError, BitrixSDKException
        
        try:
            bitrix_response = client.calendar.event.update(
                bitrix_id=699,
                type="user",
                owner_id=2,
                name="Changed Event Name",
                description="New description for event",
                from_date="2024-06-17",
                to="2024-06-17",
                skip_time="Y",
                section=5,
                color="#9cbe1c",
                text_color="#283033",
                accessibility="free",
                importance="normal",
                is_meeting="Y",
                private_event="Y",
                recurrence_mode="next",
                current_date_from="2024-12-04",
                remind=[
                    {
                        "type": "min",
                        "count": 10,
                    },
                ],
                location="London",
                attendees=[
                    1,
                    2,
                    3,
                ],
                host=2,
                meeting={
                    "notify": True,
                    "reinvite": False,
                    "allow_invite": False,
                    "hide_guests": False,
                },
                rrule={
                    "FREQ": "WEEKLY",
                    "BYDAY": [
                        "MO",
                        "WE",
                    ],
                    "COUNT": 10,
                    "INTERVAL": 1,
                },
                crm_fields=[
                    "C_5",
                    "L_11",
                ],
            ).response
            result = bitrix_response.result
            print(result)
        except BitrixAPIError as error:
            print(
                "Bitrix API error",
                f"error: {error.error}",
                f"error_description: {error.error_description}",
                sep="\n",
            )
        except BitrixSDKException as error:
            print(f"Bitrix SDK error: {error.message}")
        except Exception as error:
            print(f"Unexpected error: {error}")

try {
            $response = $b24Service
                ->core
                ->call(
                    'calendar.event.update',
                    [
                        'id'              => 699,
                        'type'            => 'user',
                        'ownerId'         => 2,
                        'name'            => 'Changed Event Name',
                        'description'     => 'New description for event',
                        'from'            => '2024-06-17',
                        'to'              => '2024-06-17',
                        'skip_time'       => 'Y',
                        'section'         => 5,
                        'color'           => '#9cbe1c',
                        'text_color'      => '#283033',
                        'accessibility'   => 'free',
                        'importance'      => 'normal',
                        'is_meeting'      => 'Y',
                        'private_event'   => 'Y',
                        'recurrence_mode' => 'next',
                        'current_date_from' => '2024-12-04',
                        'remind'          => [
                            [
                                'type'  => 'min',
                                'count' => 10
                            ]
                        ],
                        'location'        => 'London',
                        'attendees'       => [1, 2, 3],
                        'meeting'         => [
                            'notify'      => true,
                            'reinvite'    => false,
                            'allow_invite' => false,
                            'hide_guests' => false,
                        ],
                        'rrule'           => [
                            'FREQ'     => 'WEEKLY',
                            'BYDAY'    => ['MO', 'WE'],
                            'COUNT'    => 10,
                            'INTERVAL' => 1,
                        ],
                        'crm_fields'      => ['C_5', 'L_11']
                    ]
                );
        
            $result = $response
                ->getResponseData()
                ->getResult();
        
            echo 'Success: ' . print_r($result, true);
            // Your data processing logic
            processData($result);
        
        } catch (Throwable $e) {
            error_log($e->getMessage());
            echo 'Error updating calendar event: ' . $e->getMessage();
        }

BX24.callMethod(
            'calendar.event.update',
            {
                id: 699,
                type: 'user',
                ownerId: 2,
                name: 'Changed Event Name',
                description: 'New description for event',
                from: '2024-06-17',
                to: '2024-06-17',
                skip_time: 'Y',
                section: 5,
                color: '#9cbe1c',
                text_color: '#283033',
                accessibility: 'free',
                importance: 'normal',
                is_meeting: 'Y',
                private_event: 'Y',
                recurrence_mode: 'next',
                current_date_from: '2024-12-04',
                remind: [
                    {
                        type: 'min',
                        count: 10
                    }
                ],
                location: 'London',
                attendees: [1, 2, 3],
                meeting: {
                    notify: true,
                    reinvite: false,
                    allow_invite: false,
                    hide_guests: false,
                },
                rrule: {
                    FREQ: 'WEEKLY',
                    BYDAY: ['MO', 'WE'],
                    COUNT: 10,
                    INTERVAL: 1,
                },
                crm_fields: ['C_5', 'L_11']
            }
        );

require_once('crest.php');
        
        $result = CRest::call(
            'calendar.event.update',
            [
                'id' => 699,
                'type' => 'user',
                'ownerId' => 2,
                'name' => 'Changed Event Name',
                'description' => 'New description for event',
                'from' => '2024-06-17',
                'to' => '2024-06-17',
                'skip_time' => 'Y',
                'section' => 5,
                'color' => '#9cbe1c',
                'text_color' => '#283033',
                'accessibility' => 'free',
                'importance' => 'normal',
                'is_meeting' => 'Y',
                'private_event' => 'Y',
                'recurrence_mode' => 'next',
                'current_date_from' => '2024-12-04',
                'remind' => [
                    [
                        'type' => 'min',
                        'count' => 10
                    ]
                ],
                'location' => 'London',
                'attendees' => [1, 2, 3],
                'meeting' => [
                    'notify' => true,
                    'reinvite' => false,
                    'allow_invite' => false,
                    'hide_guests' => false,
                ],
                'rrule' => [
                    'FREQ' => 'WEEKLY',
                    'BYDAY' => ['MO', 'WE'],
                    'COUNT' => 10,
                    'INTERVAL' => 1,
                ],
                'crm_fields' => ['C_5', 'L_11']
            ]
        );
        
        echo '<PRE>';
        print_r($result);
        echo '</PRE>';

// client and ctx are already created — see the Go SDK section
        res, err := client.Core().Call(ctx, "calendar.event.update", b24.Params{
        	"id":                699,
        	"type":              "user",
        	"ownerId":           2,
        	"name":              "Changed Event Name",
        	"description":       "New description for event",
        	"from":              "2024-06-17",
        	"to":                "2024-06-17",
        	"skip_time":         "Y",
        	"section":           5,
        	"color":             "#9cbe1c",
        	"text_color":        "#283033",
        	"accessibility":     "free",
        	"importance":        "normal",
        	"is_meeting":        "Y",
        	"private_event":     "Y",
        	"recurrence_mode":   "next",
        	"current_date_from": "2024-12-04",
        	"remind": []b24.Params{
        		{
        			"type":  "min",
        			"count": 10,
        		},
        	},
        	"location":  "London",
        	"attendees": []int{1, 2, 3},
        	"meeting": b24.Params{
        		"notify":       true,
        		"reinvite":     false,
        		"allow_invite": false,
        		"hide_guests":  false,
        	},
        	"rrule": b24.Params{
        		"FREQ":     "WEEKLY",
        		"BYDAY":    []string{"MO", "WE"},
        		"COUNT":    10,
        		"INTERVAL": 1,
        	},
        	"crm_fields": []string{"C_5", "L_11"},
        })
        if err != nil {
        	return fmt.Errorf("calendar.event.update: %w", err)
        }
        
        var value b24.ID
        if err := json.Unmarshal(res.Result, &value); err != nil {
        	return fmt.Errorf("parse response: %w", err)
        }
        fmt.Println("result:", value)

Response Handling

HTTP status: 200

Single Event

Recurring Event

{
            "result": 1246,
            "time": {
                "start": 1733318565.183275,
                "finish": 1733318565.695058,
                "duration": 0.5117831230163574,
                "processing": 0.29406094551086426,
                "date_start": "2024-12-04T13:22:45+00:00",
                "date_finish": "2024-12-04T13:22:45+00:00"
            }
        }

{
            "result": {
                "originalDate": "12/24/2024 05:59:00 pm",
                "originalDavXmlId": "20241205T124346Z-e3ccab8aebc16d0c5cccecb63fef2bc3@b24evo.lan",
                "instanceTz": "Europe/Riga",
                "recEventId": 1261,
                "id": 1260
            },
            "time": {
                "start": 1733402626.139122,
                "finish": 1733402626.740063,
                "duration": 0.6009409427642822,
                "processing": 0.3765721321105957,
                "date_start": "2024-12-05T12:43:46+00:00",
                "date_finish": "2024-12-05T12:43:46+00:00"
            }
        }

Returned Data

Single Event

Recurring Event

Name `type`	Description
result `integer`	Identifier of the updated event.

Name `type`	Description
result `object`	Root element of the response.
originalDate `datetime`	Start date of the new series of the recurring event.
originalDavXmlId `string`	Event identifier for synchronization.
instanceTz `string`	Event timezone.
recEventId `integer`	Identifier of the new series of the recurring event.
id `integer`	Identifier of the previous series of the recurring event.

Error Handling

HTTP status: 400

{
            "error": "",
            "error_description": "The required parameter \"ownerId\" for the method \"calendar.event.update\" is not set."
        }

Name `type`	Description
error `string`	String error code. It consists of digits, Latin letters, and underscores. It may arrive empty — in that case only `error_description` shows the reason
error_description `string`	Error message for the developer. Do not show it to the end user without processing

Possible Error Codes

Code	Error Message	Description
Empty value	The required parameter "id" for the method "calendar.event.update" is not set.	The required parameter `id` is not provided.
Empty value	The required parameter "ownerId" for the method "calendar.event.update" is not set.	The required parameter `ownerId` is not provided.
Empty value	The required parameter "type" for the method "calendar.event.update" is not set.	The required parameter `type` is not provided.
Empty value	Invalid value for the "name" parameter.	Incorrect data format in the `name` field.
Empty value	Invalid value for the "description" parameter.	Incorrect data format in the `description` field.
Empty value	Access denied.	Updating events in the specified calendar is prohibited.
Empty value	You specified an invalid calendar section ID or the user does not have access to it.	An identifier of an inaccessible or non-existent calendar is provided.
Empty value	An invalid editing type for the recurring event is specified.	An incorrect value for the `recurrence_mode` field is provided.
Empty value	The event's CRM links list must be an array.	Incorrect data format in the `crm_fields` field.
Empty value	An error occurred while changing the event.	Another error.

Statuses and System Error Codes

HTTP Status: 4xx, 5xx

The errors described below are returned by the REST API itself, not by the logic of a specific method. They can arrive in response to any method.

Status	Code Error Message	Description
`500`	`INTERNAL_SERVER_ERROR` Internal server error	An internal server error has occurred. Retry the call, and if the error persists, contact the server administrator or Bitrix24 technical support
`500`	`ERROR_UNEXPECTED_ANSWER` Server returned an unexpected response	The server returned an unexpected response. Retry the call, and if the error persists, contact the server administrator or Bitrix24 technical support
`503`	`QUERY_LIMIT_EXCEEDED` Too many requests	The request intensity limit has been exceeded
`429`	`OPERATION_TIME_LIMIT` Method is blocked due to operation time limit	The method is blocked because the request resource intensity limit has been exceeded. The block is lifted automatically once the accumulated execution time of the method no longer exceeds the limit
`401`	`NO_AUTH_FOUND` Wrong authorization data	The request contains no authorization data: neither an access token nor a webhook code was passed
`401`	`INVALID_REQUEST` Https required	Methods are called over the HTTPS protocol only
`401`	`OVERLOAD_LIMIT` REST API is blocked due to overload	The REST API is blocked due to overload. This is a manual individual block. To have it lifted, contact Bitrix24 technical support
`401`	`ACCESS_DENIED` REST is available only on commercial plans	REST API access is not active for this account. In Bitrix24 Cloud, check the current plan or trial status: Vibe+ plans include REST API access, while Essentials plans do not. A webhook receives a different error message — `REST is available only by subscription`
`401`	`INVALID_CREDENTIALS` Invalid request credentials	No active webhook with the specified user identifier and secret code was found
`404`	`ERROR_METHOD_NOT_FOUND` Method not found!	No method with this name was found. The name is misspelled, the method does not exist in the REST API, or it is unavailable without the required scope
`401`	`insufficient_scope` The request requires higher privileges than provided by the webhook token	The request requires broader permissions than the token has: for a webhook these are the permissions granted to it, for an application it is the scope. For an application, the error message ends with `provided by the access token`
`401`	`expired_token` The access token provided has expired	The access token has expired
`401`	`user_access_error` The user does not have access to the application	The application is installed, but the Bitrix24 administrator has granted access to it only to specific users
`403`	`PORTAL_DELETED` Portal was deleted	The public part of the site is closed. To open it on an on-premise installation, disable the "Temporary closure of the public part of the site" option. Path to the setting: Desktop > Settings > Product Settings > Module Settings > Main Module > Temporary closure of the public part of the site

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