User blog comment:Rupert Giles/Global Navigation Update/@comment-4738639-20141204034022/@comment-452-20141204141218

Nope, read Terms of Use instead.

This paragraph: "Not to intentionally block, remove, or otherwise obstruct the proper functioning and view of advertisements, and/or user interface and functionality by other users, including but not limited to changing or adding javascript or CSS changes to the Service that would prevent the proper display or function of advertisements and/or user interface and functionality;

Wikia Staff can, and have, said that "proper display of the user interface" is "not having a clock there".