Facebook birthday sync and HTC m8

[Gary Howe]

Hi, I think this is a Facebook problem more than an m8 one but anyway. When I sync Facebook birthdays /events it works but my calendar only shows about 60% of the birthdays listed on the birthday list on Facebook itself. The same thing happens with any third party app. I cannot find anything about this online. People either say they can get the sync or can't get it. Nothing about only most of the birthdays being imported to a calendar. Any ideas? Thanks very much.