This was, at one time, the most popular question we received. Facebook slowly rolled out Dark Mode to select users and only on select devices. Today, it should be available to everyone with the aforementioned devices. But, if you do not see the Dark Mode option, we need to dig a little deeper. First, if you're using the Facebook application for iOS or Android, verify that you're running the latest version. This is important because it was a new update that presented Dark Mode to us. If it isn't up-to-date, go ahead and update your app. Next, if you're using a web browser, you may be running an out-of-date version. When Dark Mode was first released, it was only available on the New Facebook. Tap on the arrow icon in the upper right-hand corner of Facebook and look for an option to switch to New Facebook. This option should not appear at all in 2021, but as we've said, if you're somehow running an older version, you'll need to switch to New Facebook before the option appears.