Most users are reporting a "total blackout" with a third having trouble logging in and one in five reporting problems with the Facebook app.
Facebook is now down for many users.
Down Detector shows most outages are in the central areas and east coast of the United States and throughout Europe.
The outage comes at a particularly sensitive time for the company.
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"We're aware that some people are now having trouble accessing the Facebook family of apps", said a spokesperson for the social media giant that also owns WhatsApp.
Reports of the outage first came in at about 8pm. As mentioned, the feature is already available, and you can access and activate it via Facebook's Settings & Privacy section.
We already have this option on our Facebook app at the time of writing, and from the looks of it, the recorded time spent is strictly based on the device you're using.
Soon, Facebook was finally able to pinpoint the cause of the issue.
Now it's rumoured to be introducing its own dark mode to Facebook Messenger which will change your experience by changing the window from white to black.