Other: Events might not be ordered, yet time exists. This would be the case with the Timeless Barbourian Physics Yudkowsky discusses in the sequences.

Also could be the case if some variety of many worlds of quantum style, or all possible worlds of Lewis style is the case.

The Anthopic folk, like me, Katja, Bostrom and several others, might also amuse themselves by inquiring: Could in one of the many infinite universe (or Big universe) theories be the case that all time-like facts are some form of indexical fact?