As it stands currently,
Facebook actually doesn't exist on the internet it's not just an outage.
A lot of the DNS data was deleted it appears during some update server work affecting all FB owned properties.
It also caused people with access to fix, unable to do so and the people who could hope to restore physically, have been locked out of the building due to this also.
This occurred at the same time Zuckerberg asked a judge to dismiss the ant trust charges against FB and hours after a whistleblower revealed a ton of negative stuff about Facebook.
No idea when any of the services will be restored.