A new Chrome extension for Google Chrome lets you export birthdays from Facebook into a calendar. The plugin is called Birthday Calendar Extractor for Facebook. From there, its trivial to import that data into something like Outlook or Google Calendar. The bigger mistake, for me or for you, would be continuing to give your time and your personal information to a company you hate, the author says. In fact, the plugin is available in Chrome and is free to download from the Chrome Store.”]
Source: https://gizmodo.com/its-safe-to-delete-your-facebook-now-1845081921