I have a collection of photos from my daughter's kindergarten spanning May 2009 to Feb 2010. They were given to us on CD. I dragged the photos all to iphoto and merged them into one event. Though not technically one event, that's how I want to see them. That's fine, but in the event window it puts the event at the date of the earliest photo (May '09). Is there a way I can make it move to Feb '10? I don't want to change any of the photo dates.