Create google calendar event for sunset appreciation each day

sunset_appreciation.gs

/**
 * Creates an event in the user's default calendar.
 * @see https://developers.google.com/calendar/api/v3/reference/events/insert
 */
function createEvent(start) {
  const calendarId = 'primary';
  
  // make end time 15 minutes after start
  var m = 15; // minutes
  var end = new Date();
  end = new Date(end.setTime(start.getTime() + (m*60*1000)));
  console.log('start:', start, 'end:', end)

  // event details for creating event.
  let event = {
    summary: 'Sunset Appreciation',
    //location: '',
    //description: '',
    start: { dateTime: start.toISOString() },
    end: { dateTime: end.toISOString() },
    attendees: [
      // {email: 'myself'},
    ],
    // yellow background. Use Calendar.Colors.get() for the full list.
    colorId: 5
  };
  try {
    // call method to insert/create new event in provided calandar
    event = Calendar.Events.insert(event, calendarId);
    console.log('Event ID: ' + event.id);
  } catch (err) {
    console.log('Failed with error %s', err.message);
  }
}

function main() {
  // create daily calendar events at sunset time between this date range
  var start = '2023-12-18'
  var end = '2023-12-31'

  // get sunset times from API (max 1 year)
  var response = UrlFetchApp.fetch(`https://api.sunrisesunset.io/json?lat=34.12704556724034&lng=-116.03681613849004&date_start=${start}&date_end=${end}`);
  var json = response.getContentText();
  var data = JSON.parse(json);
  
  // iterate through each day
  data.results.forEach((obj) => {
    //console.log(obj);
    var sunset = obj.sunset;
    
    // parse string result
    var h = parseInt(sunset.split(':')[0]);
    var m = sunset.split(':')[1];
    var s = sunset.split(':')[2].split(' ')[0];
    var ampm = sunset.split(':')[2].split(' ')[1];
    
    // convert AM/PM to 24 hour time
    if (ampm == 'PM') { h += 12 };
    h = h.toString().padStart(2, '0');
    
    event_start = new Date(`${obj.date}T${h}:${m}:${s}`);
    createEvent(event_start);
  });
}