How can I put my words of datepicker's picked-day into Google calendar's?

TIMAI2 · September 22, 2020, 11:01am

Here is an example script:

function doGet(e) {
  
  var eName = e.parameter.eventName;
  var eStart = e.parameter.start;
  var eEnd = e.parameter.end;
  var eLoc = e.parameter.loc;
  var eDesc = e.parameter.desc;
  
  var event = CalendarApp.getDefaultCalendar().createEvent(eName,
    new Date(eStart),
    new Date(eEnd),
    {
    location: eLoc,
    description: eDesc
    });
  
  event.setColor('4');
  
  return ContentService.createTextOutput(eName + " event sent to Calendar");
  
  
}

In your blocks you would build a url for the web component and use Web1.Get:

https://<YOUR SCRIPT URL>/exec
?eventName=
Paint House
&start=
September 22, 2020 14:00:00 UTC
&end=
September 22, 2020 16:00:00 UTC
&loc=
Home
&desc=
inside and out

Note the use of getDefaultCalendar. This uses the calendar of the google account user that owns the script. This calendar would need to be shared / other users subscribed to it, for other users to be able to see the entries.

Colour Codes for events:

https://developers.google.com/apps-script/reference/calendar/event-color