Is there anyway to "default" the permalinks on the network

Is there anyway to "default" the permalinks on the network to be set up for "postname"? For some reason, all new sites created are going to "dates" and I'd prefer to have them set up permalinks under "postname". Can't seem to find it, or figure it out. Is it under Pro Sites? or New Blog Templates? Or somewhere else?

Thanks in advance.