Usually you get an ICalEvent object like this:

import ical from 'ical-generator';
const calendar = ical();
const event = calendar.createEvent();

Constructors

  • Constructor of [[ICalEvent]. The calendar reference is required to query the calendar's timezone when required.

    Parameters

    Returns ICalEvent

Methods

  • Get all alarms

    Returns ICalAlarm[]

    Since

    0.2.0

  • Add one or multiple alarms

    const event = ical().createEvent();

    cal.alarms([
    {type: ICalAlarmType.display, trigger: 600},
    {type: ICalAlarmType.audio, trigger: 300}
    ]);

    cal.alarms(); // --> [ICalAlarm, ICalAlarm]

    Parameters

    Returns this

    Since

    0.2.0

  • Get the event's allDay flag

    Returns boolean

    Since

    0.2.0

  • Set the event's allDay flag.

    event.allDay(true); // → appointment is for the whole day
    
    import ical from 'ical-generator';

    const cal = ical();

    cal.createEvent({
    start: new Date('2020-01-01'),
    summary: 'Very Important Day',
    allDay: true
    });

    cal.toString();
    BEGIN:VCALENDAR
    VERSION:2.0
    PRODID:-//sebbo.net//ical-generator//EN
    BEGIN:VEVENT
    UID:1964fe8d-32c5-4f2a-bd62-7d9d7de5992b
    SEQUENCE:0
    DTSTAMP:20240212T191956Z
    DTSTART;VALUE=DATE:20200101
    X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
    X-MICROSOFT-MSNCALENDAR-ALLDAYEVENT:TRUE
    SUMMARY:Very Important Day
    END:VEVENT
    END:VCALENDAR
    

    Parameters

    • allDay: boolean

    Returns this

    Since

    0.2.0

  • Get all attachment urls

    Returns string[]

    Since

    3.2.0-develop.1

  • Add one or multiple alarms

    const event = ical().createEvent();

    cal.attachments([
    'https://files.sebbo.net/calendar/attachments/foo',
    'https://files.sebbo.net/calendar/attachments/bar'
    ]);

    cal.attachments(); // --> [string, string]

    3.2.0-develop.1

    Parameters

    • attachments: string[]

    Returns this

  • Get all attendees

    Returns ICalAttendee[]

    Since

    0.2.0

  • Add multiple attendees to your event

    const event = ical().createEvent();

    cal.attendees([
    {email: 'a@example.com', name: 'Person A'},
    {email: 'b@example.com', name: 'Person B'}
    ]);

    cal.attendees(); // --> [ICalAttendee, ICalAttendee]

    Parameters

    Returns this

    Since

    0.2.0

  • Get all categories

    Returns ICalCategory[]

    Since

    0.3.0

  • Add categories to the event or return all selected categories.

    const event = ical().createEvent();

    cal.categories([
    {name: 'APPOINTMENT'},
    {name: 'MEETING'}
    ]);

    cal.categories(); // --> [ICalCategory, ICalCategory]

    Parameters

    Returns this

    Since

    0.3.0

  • Creates a new ICalAlarm and returns it. Use options to prefill the alarm's attributes. Calling this method without options will create an empty alarm.

    const cal = ical();
    const event = cal.createEvent();
    const alarm = event.createAlarm({type: ICalAlarmType.display, trigger: 300});

    // add another alarm
    event.createAlarm({
    type: ICalAlarmType.audio,
    trigger: 300, // 5min before event
    });

    Parameters

    Returns ICalAlarm

    Since

    0.2.1

  • Adds an attachment to the event by adding the file URL to the calendar.

    ical-generator only supports external attachments. File attachments that are directly included in the file are not supported, because otherwise the calendar file could easily become unfavourably large.

    const cal = ical();
    const event = cal.createEvent();
    event.createAttachment('https://files.sebbo.net/calendar/attachments/foo');

    Parameters

    • url: string

    Returns this

    Since

    3.2.0-develop.1

  • Creates a new ICalAttendee and returns it. Use options to prefill the attendee's attributes. Calling this method without options will create an empty attendee.

    import ical from 'ical-generator';

    const cal = ical();
    const event = cal.createEvent({
    start: new Date()
    });

    event.createAttendee({email: 'hui@example.com', name: 'Hui'});

    // add another attendee
    event.createAttendee('Buh <buh@example.net>');
    BEGIN:VCALENDAR
    VERSION:2.0
    PRODID:-//sebbo.net//ical-generator//EN
    BEGIN:VEVENT
    UID:b4944f07-98e4-4581-ac80-2589bb20273d
    SEQUENCE:0
    DTSTAMP:20240212T194232Z
    DTSTART:20240212T194232Z
    SUMMARY:
    ATTENDEE;ROLE=REQ-PARTICIPANT;CN="Hui":MAILTO:hui@example.com
    ATTENDEE;ROLE=REQ-PARTICIPANT;CN="Buh":MAILTO:buh@example.net
    END:VEVENT
    END:VCALENDAR
    

    As with the organizer, you can also add an explicit mailto address.

    event.createAttendee({email: 'hui@example.com', name: 'Hui', mailto: 'another@mailto.com'});

    // overwrite an attendee's mailto address
    attendee.mailto('another@mailto.net');

    Parameters

    Returns ICalAttendee

    Since

    0.2.0

  • Creates a new ICalCategory and returns it. Use options to prefill the category's attributes. Calling this method without options will create an empty category.

    const cal = ical();
    const event = cal.createEvent();
    const category = event.createCategory({name: 'APPOINTMENT'});

    // add another category
    event.createCategory({
    name: 'MEETING'
    });

    Parameters

    Returns ICalCategory

    Since

    0.3.0

  • Get the event's description as an ICalDescription object.

    Returns null | ICalDescription

    Since

    0.2.0

  • Set the events description by passing a plaintext string or an object containing both a plaintext and a html description. Only a few calendar apps support html descriptions and like in emails, supported HTML tags and styling is limited.

    event.description({
    plain: 'Hello World!',
    html: '<p>Hello World!</p>'
    });
    DESCRIPTION:Hello World!
    X-ALT-DESC;FMTTYPE=text/html:<p>Hello World!</p>
    

    Parameters

    Returns this

    Since

    0.2.0

  • Get the event end time which is currently set. Can be any supported date object.

    Returns null | ICalDateTimeValue

    Since

    0.2.0

  • Set the appointment date of end. You can use any supported date object, see readme for details about supported values and timezone handling.

    Parameters

    Returns this

    Since

    0.2.0

  • Get the event's floating flag.

    Returns boolean

    Since

    0.2.0

  • Set the event's floating flag. This unsets the event's timezone. Events whose floating flag is set to true always take place at the same time, regardless of the time zone.

    import ical from 'ical-generator';

    const cal = ical();

    cal.createEvent({
    start: new Date('2020-01-01T20:00:00Z'),
    summary: 'Always at 20:00 in every <Timezone',
    floating: true
    });

    cal.toString();
    BEGIN:VCALENDAR
    VERSION:2.0
    PRODID:-//sebbo.net//ical-generator//EN
    BEGIN:VEVENT
    UID:5d7278f9-ada3-40ef-83d1-23c29ce0a763
    SEQUENCE:0
    DTSTAMP:20240212T192214Z
    DTSTART:20200101T200000
    SUMMARY:Always at 20:00 in every <Timezone
    END:VEVENT
    END:VCALENDAR
    

    Parameters

    • floating: boolean

    Returns this

    Since

    0.2.0

  • Get the event's ID

    Returns string

    Since

    0.2.0

  • Use this method to set the event's ID. If not set, a UUID will be generated randomly.

    Parameters

    • id: string | number

      Event ID you want to set

    Returns this

  • Get the event's location

    Returns null | ICalLocation

    Since

    0.2.0

  • Set the event's location by passing a string (minimum) or an ICalLocationWithTitle object which will also fill the iCal GEO attribute and Apple's X-APPLE-STRUCTURED-LOCATION.

    event.location({
    title: 'Apple Store Kurfürstendamm',
    address: 'Kurfürstendamm 26, 10719 Berlin, Deutschland',
    radius: 141.1751386318387,
    geo: {
    lat: 52.503630,
    lon: 13.328650
    }
    });
    LOCATION:Apple Store Kurfürstendamm\nKurfürstendamm 26\, 10719 Berlin\,
     Deutschland
    X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=Kurfürstendamm 26\, 10719
      Berlin\, Deutschland;X-APPLE-RADIUS=141.1751386318387;X-TITLE=Apple Store
      Kurfürstendamm:geo:52.50363,13.32865
    GEO:52.50363;13.32865
    

    Since v6.1.0 you can also pass a ICalLocationWithoutTitle object to pass the geolocation only. This will only fill the iCal GEO attribute.

    event.location({
    geo: {
    lat: 52.503630,
    lon: 13.328650
    }
    });
    GEO:52.50363;13.32865
    

    Parameters

    Returns this

    Since

    0.2.0

  • Get the event's organizer

    Returns null | ICalOrganizer

    Since

    0.2.0

  • Set the event's organizer

    event.organizer({
    name: 'Organizer\'s Name',
    email: 'organizer@example.com'
    });

    // OR

    event.organizer('Organizer\'s Name <organizer@example.com>');

    You can also add an explicit mailto email address or or the sentBy address.

        event.organizer({
    name: 'Organizer\'s Name',
    email: 'organizer@example.com',
    mailto: 'explicit@mailto.com',
    sentBy: 'substitute@example.com'
    })

    Parameters

    Returns this

    Since

    0.2.0

  • Get the event's priority. A value of 1 represents the highest priority, 9 the lowest. 0 specifies an undefined priority.

    Returns null | number

    Since

    v2.0.0-develop.7

  • Set the event's priority. A value of 1 represents the highest priority, 9 the lowest. 0 specifies an undefined priority.

    Parameters

    • priority: null | number

    Returns this

    Since

    v2.0.0-develop.7

  • Get the event's repeating options

    Returns null | string | ICalRRuleStub | ICalEventJSONRepeatingData

    Since

    0.2.0

  • Set the event's repeating options by passing an ICalRepeatingOptions object.

    event.repeating({
    freq: 'MONTHLY', // required
    count: 5,
    interval: 2,
    until: new Date('Jan 01 2014 00:00:00 UTC'),
    byDay: ['su', 'mo'], // repeat only sunday and monday
    byMonth: [1, 2], // repeat only in january and february,
    byMonthDay: [1, 15], // repeat only on the 1st and 15th
    bySetPos: 3, // repeat every 3rd sunday (will take the first element of the byDay array)
    exclude: [new Date('Dec 25 2013 00:00:00 UTC')], // exclude these dates
    excludeTimezone: 'Europe/Berlin', // timezone of exclude
    wkst: 'SU' // Start the week on Sunday, default is Monday
    });

    Example:

    import ical, { ICalEventRepeatingFreq } from 'ical-generator';

    const cal = ical();

    const event = cal.createEvent({
    start: new Date('2020-01-01T20:00:00Z'),
    summary: 'Repeating Event'
    });
    event.repeating({
    freq: ICalEventRepeatingFreq.WEEKLY,
    count: 4
    });

    cal.toString();
    BEGIN:VCALENDAR
    VERSION:2.0
    PRODID:-//sebbo.net//ical-generator//EN
    BEGIN:VEVENT
    UID:b80e6a68-c2cd-48f5-b94d-cecc7ce83871
    SEQUENCE:0
    DTSTAMP:20240212T193646Z
    DTSTART:20200101T200000Z
    RRULE:FREQ=WEEKLY;COUNT=4
    SUMMARY:Repeating Event
    END:VEVENT
    END:VCALENDAR
    

    Parameters

    Returns this

    Since

    0.2.0

  • Set the event's repeating options by passing an RRule object.

    Parameters

    Returns this

    Since

    2.0.0-develop.5

    import ical from 'ical-generator';
    import { datetime, RRule } from 'rrule';

    const cal = ical();

    const event = cal.createEvent({
    start: new Date('2020-01-01T20:00:00Z'),
    summary: 'Repeating Event'
    });

    const rule = new RRule({
    freq: RRule.WEEKLY,
    interval: 5,
    byweekday: [RRule.MO, RRule.FR],
    dtstart: datetime(2012, 2, 1, 10, 30),
    until: datetime(2012, 12, 31)
    })
    event.repeating(rule);

    cal.toString();
    BEGIN:VCALENDAR
    VERSION:2.0
    PRODID:-//sebbo.net//ical-generator//EN
    BEGIN:VEVENT
    UID:36585e40-8fa8-460d-af0c-88b6f434030b
    SEQUENCE:0
    DTSTAMP:20240212T193827Z
    DTSTART:20200101T200000Z
    RRULE:FREQ=WEEKLY;INTERVAL=5;BYDAY=MO,FR;UNTIL=20121231T000000Z
    SUMMARY:Repeating Event
    END:VEVENT
    END:VCALENDAR
    
  • Set the events repeating options by passing a string which is inserted in the ical file.

    Parameters

    • repeating: null | string

    Returns this

    Since

    2.0.0-develop.5

  • Get the event's SEQUENCE number. Use this method to get the event's revision sequence number of the calendar component within a sequence of revisions.

    Returns number

    Since

    0.2.6

  • Set the event's SEQUENCE number. For a new event, this should be zero. Each time the organizer makes a significant revision, the sequence number should be incremented.

    Parameters

    • sequence: number

      Sequence number or null to unset it

    Returns this

  • Get the event's timestamp

    Returns ICalDateTimeValue

    Since

    0.2.0

  • Set the appointment date of creation. Defaults to the current time and date (new Date()). You can use any supported date object, see readme for details about supported values and timezone handling.

    Parameters

    Returns this

    Since

    0.2.0

  • Get the event start time which is currently set. Can be any supported date object.

    Returns ICalDateTimeValue

    Since

    0.2.0

  • Set the appointment date of beginning, which is required for all events. You can use any supported date object, see Readme for details about supported values and timezone handling.

    import ical from 'ical-generator';

    const cal = ical();

    const event = cal.createEvent({
    start: new Date('2020-01-01')
    });

    // overwrites old start date
    event.start(new Date('2024-02-01'));

    cal.toString();
    BEGIN:VCALENDAR
    VERSION:2.0
    PRODID:-//sebbo.net//ical-generator//EN
    BEGIN:VEVENT
    UID:7e2aee64-b07a-4256-9b3e-e9eaa452bac8
    SEQUENCE:0
    DTSTAMP:20240212T190915Z
    DTSTART:20240201T000000Z
    SUMMARY:
    END:VEVENT
    END:VCALENDAR
    

    Parameters

    Returns this

    Since

    0.2.0

  • Get the event's summary

    Returns string

    Since

    0.2.0

  • Set the event's summary. Defaults to an empty string if nothing is set.

    Parameters

    • summary: string

    Returns this

    Since

    0.2.0

  • Get the event's timestamp

    Returns ICalDateTimeValue

    Since

    0.2.0

    Alias

    stamp

  • Set the appointment date of creation. Defaults to the current time and date (new Date()). You can use any supported date object, see readme for details about supported values and timezone handling.

    Parameters

    Returns this

    Since

    0.2.0

    Alias

    stamp

  • Get the event's timezone.

    Returns null | string

    Since

    0.2.6

  • Sets the time zone to be used for this event. If a time zone has been defined in both the event and the calendar, the time zone of the event is used.

    Please note that if the time zone is set, ical-generator assumes that all times are already in the correct time zone. Alternatively, a moment-timezone or a Luxon object can be passed with setZone, ical-generator will then set the time zone itself.

    This and the 'floating' flag (see below) are mutually exclusive, and setting a timezone will unset the 'floating' flag. If neither 'timezone' nor 'floating' are set, the date will be output with in UTC format (see date-time form #2 in section 3.3.5 of RFC 554).

    See Readme for details about supported values and timezone handling.

    event.timezone('America/New_York');
    

    Parameters

    • timezone: null | string

    Returns this

  • Return a shallow copy of the events's options for JSON stringification. Third party objects like moment.js values or RRule objects are stringified as well. Can be used for persistence.

    const event = ical().createEvent();
    const json = JSON.stringify(event);

    // later: restore event data
    const calendar = ical().createEvent(JSON.parse(json));

    Returns ICalEventJSONData

    Since

    0.2.4

  • Return generated event as a string.

    const event = ical().createEvent();
    console.log(event.toString()); // → BEGIN:VEVENT…

    Returns string

  • Get the event's transparency

    Returns null | ICalEventTransparency

    Since

    1.7.3

  • Set the event's transparency

    Set the field to OPAQUE if the person or resource is no longer available due to this event. If the calendar entry has no influence on availability, you can set the field to TRANSPARENT. This value is mostly used to find out if a person has time on a certain date or not (see TRANSP in iCal specification).

    import ical, {ICalEventTransparency} from 'ical-generator';
    event.transparency(ICalEventTransparency.OPAQUE);

    Parameters

    Returns this

    Since

    1.7.3

  • Get the event's ID

    Returns string

    Since

    0.2.0

    Alias

    id

  • Use this method to set the event's ID. If not set, a UUID will be generated randomly.

    Parameters

    • id: string | number

      Event ID you want to set

    Returns this

    Alias

    id

  • Get the event's URL

    Returns null | string

    Since

    0.2.0

  • Set the event's URL

    Parameters

    • url: null | string

    Returns this

    Since

    0.2.0

  • Set X-* attributes. Woun't filter double attributes, which are also added by another method (e.g. summary), so these attributes may be inserted twice.

    event.x([
    {
    key: "X-MY-CUSTOM-ATTR",
    value: "1337!"
    }
    ]);

    event.x([
    ["X-MY-CUSTOM-ATTR", "1337!"]
    ]);

    event.x({
    "X-MY-CUSTOM-ATTR": "1337!"
    });

    Parameters

    • keyOrArray: Record<string, string> | [string, string][] | {
          key: string;
          value: string;
      }[]

    Returns this

    Since

    1.9.0

  • Set a X-* attribute. Woun't filter double attributes, which are also added by another method (e.g. summary), so these attributes may be inserted twice.

    event.x("X-MY-CUSTOM-ATTR", "1337!");
    

    Parameters

    • keyOrArray: string
    • value: string

    Returns this

    Since

    1.9.0

  • Get all custom X-* attributes.

    Returns {
        key: string;
        value: string;
    }[]

    Since

    1.9.0

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