How to delete all events on many dates all at once but not the whole Calendar in Google Calendar?

Question

How to delete all events on many dates all at once but not the whole Calendar in Google Calendar? I tried to click on a date that got an event to delete and dragged my mouse to 2 days after that date, but then I always see "create an Event". I thought I could press backspace or delete to delete all those events.

What I did so far = deleting event one by one :(

Answer 1

I've been able to do this with a Google Script like this. You can alter this to pinpoint the days you want to delete, etc.

function delete_events()
{
    var fromDate = new Date(2013,0,1,0,0,0); 
    var toDate = new Date(2013,0,4,0,0,0);
    var calendarName = 'My Calendar';

    // delete from Jan 1 to end of Jan 4, 2013 (for month 0 = Jan, 1 = Feb...)

    var calendar = CalendarApp.getCalendarsByName(calendarName)[0];
    var events = calendar.getEvents(fromDate, toDate);
    for(var i=0; i<events.length;i++){
      var ev = events[i];
      Logger.log(ev.getTitle()); // show event name in log
      ev.deleteEvent();
    }
 }

Answer 2

I found a modification that can make this script worthwhile if you want to look for certain events. That you intentionally or not imported. Lets say a lot of entry have Cycle 1 Checkpoint 10 in the name followed by a number or whatever. Be advised that "Cycle 1 Checkpoint 10", "Cycle 1 Checkpoint 20" will be found but "Cycle1 Checkpoint 10" not..

function delete_events()
{
  //take care: Date function starts at 0 for the month (January=0)
  //{search: 'cycle'+"*"+'Checkpoint'} hier zijn de search terms
  var fromDate = new Date(2014,7,1,0,0,0); //This is August 1, 2014
  var toDate = new Date(2016,2,1,0,0,0);   //This is March 1, 2016 at 00h00'00"
  var calendarName = 'GuyForssman';


  var calendar = CalendarApp.getCalendarsByName(calendarName)[0];
  var events = calendar.getEvents(fromDate, toDate,{search: 'cycle'+"*"+Checkpoint'+"*"});
  for(var i=0; i<events.length;i++)
  {
    var ev = events[i];
      Logger.log('Item '+ev.getTitle()+' found on '+ev.getStartTime()); // show event name and date in log
      //ev.deleteEvent(); //uncomment this line to actually do the delete !
  }
}

Answer 3

After migrating from a previous calendar system to Google Apps, all recurring events were imported individually. I created a new Google Script at https://script.google.com and modified it to remove only some of the events (a new recurring event was already made with another name).

function delete_events()
{
  //take care: Date function starts at 0 for the month (January=0)
  var fromDate = new Date(2014,7,1,0,0,0); //This is August 1, 2014
  var toDate = new Date(2016,2,1,0,0,0);   //This is March 1, 2016 at 00h00'00"
  var calendarName = 'your_calendar_name';
  var toRemove = 'title_of_the_events';

  var calendar = CalendarApp.getCalendarsByName(calendarName)[0];
  var events = calendar.getEvents(fromDate, toDate,{search: toRemove});
  for(var i=0; i<events.length;i++)
  {
    var ev = events[i];
    if(ev.getTitle()==toRemove) //check if the title matches
    {
      Logger.log('Item '+ev.getTitle()+' found on '+ev.getStartTime()); // show event name and date in log
      //ev.deleteEvent(); //uncomment this line to actually do the delete !
    }
  }
}

Answer 4

Best thing I have found is using the mass delete function from the mobile app, Business Calendar Pro by Appgenixsoftware.

Answer 5

There is a free API client at http://www.gcaltoolkit.com. It has a network version that is free for 1000 entries and downloadable versions for Windows and Mac that may be free as well. I tried it and it worked quickly for me.

You can select by date or by search terms and it looks like you can manually modify that further. Or just click the ones you want to delete. After you decide, there is a button to commit your changes back to Google Calendar.

I found this very helpful when I had the same problem a few minutes ago and was surprised to see it wasn't on here.

Answer 6

If you want to delete all the events in a calendar you can go to the calendar settings and delete the whole calendar.

If it's your main calendar it will delete all of its entries, and if it's another calendar it will delete the whole calendar therefore you will have to create a new one.