3. Export all of your friends’ birthdays to Google Calendar, iCal, or Outlook.
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Never miss a birthday AGAIN. Go to your Events page in the left column. Now look on the bottom right for two links: Upcoming Events and Birthdays. Copy one of those links.
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Open Google Calendar, and click on the down arrow next to Other Calendars > Add by URL, paste the URL and… you’re done!
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In iCal, go to Calendar > Subscribe and enter the URL.
In Outlook, go to Tools > Account Settings > Internet Calendars.