As an aus player, I go by the EU website and use GMT time, but I noticed a discrepancy in the times used on the maintenance post here on the forum and in the website. The NA and JP sites are as follows:

Sep. 15, 2014 8:00 p.m. to Sep. 16, 2014 4:00 a.m. (PDT)

日　時：2014年9月16日(火) 12:00より20:00頃まで
indicating 8 hours total maintenance. However the EU site says;
Sep. 15, 2014 3:00 to Sep. 16, 2014 11:00 (GMT)
which is 32 hours total. I am guessing the start DAY should be sep 16th.