In terms of HalloweenTime, the decor generally starts appearing early September. The attractions (Space and HM) and entertainment (Big Thunder Carinval) will start in mid-September. This year, HalloweenTime starts on 9/12/14. Assuming no major deviations in the schedule due to the 60th, I would tentatively guess HalloweenTime will start on 9/11/15, but as Sherry (the leading Halloween/Christmas person) pointed out, Disneyland may not want to start the festivities on 9/11, so HalloweenTime might official start on 9/10 or 9/12 next year.