My phone is syncing with my Google Calendar. I have just worked out how to add additional calendars on the phone, but now I have come against another hurdle. I want to add some sports calendars, e.g. the fixtures for my favourite football team, etc. I have sorted this out in Google Calendar, but when I try to add these in my phone the option is greyed out. Is there a limit to the amount of calendars the Android calendar can handle? At the moment I have 5 additional calendars on my phone on top of the main calendar. When I first tried to add Contacts' Birthdays, the "OK" button was greyed out. After a few attempts it finally appeared in the list. But I cannot get it to do it for the sports calendars that I want to add. Any thoughts on this?