function Start() {
  var link = 'http://www.bbc.co.uk/weather/YOUR_CITY_CODE';

  // Calcutta, India:  'http://www.bbc.co.uk/weather/1275004';
  // New Delhi, India: 'http://www.bbc.co.uk/weather/1261481';
  // Kansas, USA:      'http://www.bbc.co.uk/weather/4393217';
  // Tokyo, Japan:     'http://www.bbc.co.uk/weather/1850147';

  link = link.substring(link.indexOf('r/') + 2, link.length);
  var url = 'http://open.live.bbc.co.uk/weather/feeds/en/' + link + '/3dayforecast.rss';
  var xml = UrlFetchApp.fetch(url).getContentText();

  xml = xml.substring(xml.indexOf('</image>') + 34, xml.length);
  xml = xml.substring(0, xml.indexOf('</title>'));

  for (var i = 0; i < 4; i++) xml = xml.replace('°', ' ');

  var forecast = xml.substring(0, xml.indexOf(','));

  var c = xml.replace('imum Temperature', '');
  c = c.replace('imum Temperature', '');
  var output = c.substring(c.indexOf('day:') + 5, c.length);

  var now = new Date().getTime();
  CalendarApp.createEvent(output, new Date(now + 60000), new Date(now + 60000)).addSmsReminder(0);
}

function Install() {
  ScriptApp.newTrigger('Start').timeBased().atHour(5).everyDays(1).create();

  ScriptApp.newTrigger('Start').timeBased().atHour(18).everyDays(1).create();
}

function Uninstall() {
  var triggers = ScriptApp.getScriptTriggers();
  for (var i = 0; i < triggers.length; i++) {
    ScriptApp.deleteTrigger(triggers[i]);
  }
}