Down here in South Texas I (along with others) believe that the rut in this area is triggered by changes in the weather. Are rut normally starts between Dec. 7-14 and peaks around christmas time. The temperature in sept-nov. is normally pretty warm, ranging from the 90's - high 60's. But it seems like we always get are first cold front during the first part of December each year. When ever that cold front hits, it seems like it makes all the bucks get up and start searching for does.
I normally dont hunt "by the moon", it really dosent make a difference to me what the moon is doing. But if any of ya'll are planning on hunting in South Texas, then you better be in a stand during the first cold front in December, because I can promise you that your going to see rutting activity. And one more thing, make sure you have a pair of rattling horns with you