Having set up my contacts and calendar on iCloud I can't understand why it won't display my contacts' birthdays. The birthdays appear on iCal on my Mac which is now only displaying my iCloud calendar and the same is true for my iPhone calendar - only my iCloud account is not showing the birthdays. I set up iCloud on my wife's mac and iPhone and my parents' Mac and iPhones and iCloud.com displayed the birthdays without any problems. I made sure that the birthdays calendar was checked in iCloud preferences and also checked on the calendar itself but still no luck. I have also checked the birthdays in my contacts to make sure they are in the correct format. Any ideas?