Create calendar events.

README.md

Paste code into the browser command line. First the funciton definitions in create_events.js and press enter. Then contents of example_usage.js to create some events and press enter:

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Once you do that it'll download an ics file:

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which you can import into your google calendar like so:

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here are the 2 example events in my calendar:

create_events.js

function openICalEvents(events) {
  let calendarData = "BEGIN:VCALENDAR\nVERSION:2.0\n";

  events.forEach(function(event) {
    calendarData += "BEGIN:VEVENT\n" +
      "SUMMARY:" + event.title + "\n" +
      "DTSTART:" + formatDate(event.startDate) + "\n" +
      "DTEND:" + formatDate(event.endDate) + "\n" +
      "LOCATION:" + event.location + "\n" +
      "DESCRIPTION:" + event.description + "\n" +
      "END:VEVENT\n";
  });

  calendarData += "END:VCALENDAR";

  const calendarUrl = "data:text/calendar;charset=utf-8," + encodeURIComponent(calendarData);

  window.open(calendarUrl);
}

function formatDate(date) {
  const year = date.getUTCFullYear();
  const month = padNumber(date.getUTCMonth() + 1);
  const day = padNumber(date.getUTCDate());
  const hours = padNumber(date.getUTCHours());
  const minutes = padNumber(date.getUTCMinutes());
  const seconds = padNumber(date.getUTCSeconds());

  return year + month + day + "T" + hours + minutes + seconds + "Z";
}

function padNumber(num) {
  return num < 10 ? "0" + num : num;
}

example_usage.js

const events = [
  {
    title: "Meeting with John",
    startDate: new Date("2023-05-01T10:00:00Z"),
    endDate: new Date("2023-05-01T12:00:00Z"),
    location: "Office",
    description: "Discuss project status"
  },
  {
    title: "Lunch with Jane",
    startDate: new Date("2023-05-02T12:00:00Z"),
    endDate: new Date("2023-05-02T13:00:00Z"),
    location: "Restaurant",
    description: "Catch up on recent events"
  }
];

openICalEvents(events);