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In my Google Calendar, I sometimes find spam events that I never created.

In the screenshot below, you can see that they even managed to put my email address in the "Created by" field.

They are always in the past.

I could not find much information about this problem. This Google support tip tells me to click "Report spam", but there is no such link.

I could simply remove the event, but is there a more long-term solution?

I am using an up-to-date Firefox, on updated Ubuntu Linux, and check Google's "Activity on this account" often, so I think I can rule out the possibility of account hijacking.

screen shot

The spam events appear in my main calendar (I mean: the first one on the list, the one which does not have an "unsubscribe" link).
The sharing settings for this calendar are as seen below:

enter image description here

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Is this on your main calendar, or a separate calendar you've created? – Al E. Apr 5 '13 at 13:12
@AlEverett: The spam events appear in my main calendar, sorry for forgetting to mention this. I added a screenshot of the sharing settings. – nic Apr 8 '13 at 0:59
up vote 10 down vote accepted

I have found the answer here.


  • In Calendar: Click the gear, select "Settings",
  • Find the "Automatically add invitations to my calendar" section,
  • Set its value to "No, only show invitations to which I have responded".

enter image description here

share|improve this answer
D'oh! Of course! Why didn't I think of that? (I've removed my incorrect guesses.) – Al E. Apr 23 '13 at 12:26
Update 7 weeks later: I got such a spam event again! It appears that the setting got switched back to Yes, even though I hadn't touched it or even opened the settings page ever since. – nic Jun 11 '13 at 9:15
Apparently, this is a well-known exploit and may not be fixed any time soon. Ars Technica: How Google Calendar can be a spammer’s best friend – Al E. Jan 28 '14 at 19:00
I wish they had an actually useful setting, such as "Only add invitations received from people I've emailed" or "Only add invitations from my contacts" – Ben Voigt Sep 13 '14 at 17:59

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