1.1 --- a/imipweb/client.py	Mon Sep 28 17:03:39 2015 +0200
     1.2 +++ b/imipweb/client.py	Mon Sep 28 17:04:03 2015 +0200
     1.3 @@ -130,7 +130,7 @@
     1.4              for p in to_unschedule:
     1.5                  if not p.origin:
     1.6                      continue
     1.7 -                obj["RECURRENCE-ID"] = [p.get_start_item()]
     1.8 +                obj["RECURRENCE-ID"] = [(format_datetime(p.get_start()), p.get_start_attr())]
     1.9                  parts.append(obj.to_part("CANCEL"))
    1.10  
    1.11          # Send the updated event, along with a cancellation for each of the