https://wccftech.com/facebook-messenger-dark-mode-is-now-available-for-everyone-toggle-it-straight-from-apps-settings/ > What started off as a cool Easter Egg feature for Messenger, dark mode is now rolling out to all iOS and Android users around the globe. > Facebook Messenger managed to climb to the top of the charts and become the go-to messaging app for a lot of users around the world. To elevate the experience further, the social network giant brought dark mode to the masses which had to be enabled by sending a crescent emoji to another user. Essentially an Easter Egg in the app.