After the version release, there some post on the mailing list disappoited about some of features remove, especially the time support. I explained to one of the post.

Comparing the more memory needed , more function to support it with the actually usefulness of the function, I decided not to support this feature. When you have the time support, you can specify at what time range the subject(program) can access the object(file), without it, the program can always can write to the object(file), from the security point of view, the time support do not increase the security bar, because the attacker can launch the attack at the specific time or just try every one min.