Currently Being ModeratedJun 14, 2012 10:09 AM (in response to andrepeternell)
It's quite possible I sync 6 Google calendars to my iPhone and iPad:
Currently Being ModeratedJun 15, 2012 1:38 AM (in response to Meg St._Clair)
I kkew this, but... my question was obsolete, sorry.
This is because the Google calendar for the contacts' birthdays cannot be synchronized with the iPhone.
(But all Android smartphones are able to access it.).