03-20-2013 11:26 PM
Welcome to the BlackBerry Support Community Forums.
Thanks for the question.
This is by design, This issue occurs because the calendar and contact list do not poll each other regularly in order to remain synchronized. If this were the case, serious performance issues would appear on the BlackBerry smartphone including battery drain, and if the contact list contains many contacts with birthday information, malfunctions may occur with the BlackBerry smartphone.
To work around this issue you can manually update the birthday information in the contacts.
Let me know if you have any more questions.
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03-29-2013 12:58 PM
"To work around this issue you can manually update the birthday information in the contacts."
I don't understand this answer.
Are you suggesting that to get Birthdays from Contact Details you have to "update" and save the changes in the Contact and this then transfers it to the Calendar?
Should this work if the Contacts have come from contacts.icloud.com? And if so, were should I update them, on my Z10 or via iCloud?