That depend on how you look at time doesn't it.

If one considers that time is merely an expression of movement within the physical realm then of course one would say the creator created time, time is simply in this instance a reflection of the relationship between cause and effect, each progressing one from the other, the creator thus becomes the cause without effect (in that he made the initial cause which started the chain reaction but the creator has no effect predating the creators existence).

One could also look at it as the ceator being time, or existing alongside it, which is a very ancient concept (for the kemitans you would see this as the kheperu [scarab beetle] ascending from non existence [kheperu representing eternity] with the creator and the "lesser gods" in tow). This would mean, not that time is a separate thing from the creator but that time is the creator and so doesn't have to be a created thing, which would explain why the creator is eternal.

One could also say that it is a mixture of both theories that is the how time came to be (the creator being the initial cause, the chain reaction of cause and effect [time] coming from the creators very being).

Just some theories I've come across (ones that I believe are credible for creation theories)