You can manually input your facebook friend’s birthday in your google calendar or you can do it smartly by using fbCAL. One of the my favorite applications in facebook because it associates your facebook calendar to one of the popular event planning,calendar software and web applications available. So if you don’t like the feel of using Google Calendar then you can choose other applications in which you can  import the data.

First go to fbcal’s official website and click the button “Create your calendars Now“. Use your facebook account to login in fbCal and allow it to access your profile information and offline access.

When you’re in the main application you can choose two options. export your events and export the birthdays. Click the corresponding logo of Google Calendar and you’re done. There are times when fbCal’s export function doesn’t work so just download a copy of it and import the iCalendar File in your Google Calendar by going to Settings -> Calendar Tab -> Import Calendar. Choose the Downloaded iCalendar File  then wait for this confirmation to show. If unsuccessful repeat the import process until you got it right.