More online calendars

I have online calendars on Yahoo, Windows Live, Google & Cozi. I had birthdays on Yahoo & events/reminders on Google & Cozi. After manually syncing Yahoo & Google calendars, I found the import feature to sync Windows Live. The import did not work with Cozi; none of the event names transferred.  I could probably eliminate the Yahoo & Windows Live calendars. I get Google reminders on my iPhone, so it is the most useful.  I like Cozi's weekly agenda reminder e-mail.