Hi, I actually faced a strange problem which is that when I add events in september 2011, they don't show up in the calendar view and the view remains empty but they appear in the all events view but events in other months appear. Another strange thing is that I was adding events in July 2011. In the calendar view of July 2011, the first 6 days of August appear but this isn't the problem but the problem is that when I add about 3 events in 31 July then about another three from 31 July to 4 August and then about 2 events from 1 to 4 August, the events are collapsed and the 3 more items appear but when I click the link, I don’t see the events that were just on 31 July and I tried this too in the end of March so it seems that the months whose calendar view includes some days from the next month have a problem. And finally when I change the month to be october 2010, I get error page with the text: An unexpected erro has occured. web parts maintenance page: If you have permission, you can use this page to temporarily close Web Parts or remove personal settings. For more information, contact your site administrator. and I checked in more than one calendar and in more than one site and it's the same, So I'm asking if any one faced something like this. The calendars on test server are working correctly so I was asking if there is a layout file that I can take from test server and replace the one on production? But if I can do something like this, will this cause loss of data in my calendars in production? Thanks in advance.