The Spanish Competition Committee has officially approved a request from Barcelona and Real Madrid to play el clásico on December 18th, having postponed the match that would have taken place this coming weekend due to protests relating to Catalan independence.
La Liga is expected to challenge the date. Their original proposal was to play at the Santiago Bernabéu on the original date, but, after this idea was rebuffed, they proposed playing it on December 4th. The reason for that was that there would not be Copa del Rey games on the 4th, but there are some games programmed for the 18th.