Yosemite crashes on searching Calendar for repeating events
iCloud has created literally hundreds of Calendar entries for birthdays I do not want to record. When I do a search of a name or other keyword with the intention of deleting them, Calendar crashes, without fail (dozens of tries). When I search for a keyword occurring in a once-off event there is no crash. I have used Time Machine to restore Calendar to an earlier date but it seems to be a bug ever since I installed Yosemite (June 2014 MacBook Air). Can anyone help?
MacBook Air, OS X Yosemite (10.10)