PDT is used for summer (Daylight Saving time in USA) and PST used for winter (Standard time). I think PST is -8 and PDT is -7, but yer 3 hrs more.
I hope this "attendance" event isn't a locked bonus EXP time like it was in Acclaim.. I can't play during prime time, and it would be pretty sad to have to modify my work schedule just to enjoy the bonus time.
Everything you make without any concern can bug the game or make the gameplay a crap. The reason that you asking about rates I've already said before.... Players are familiar with high rates and don't want to wait on hunting itens, making a hero league and etc. If you have a high exp rate, masters and pupil gameplay also will be affected by logical thinking.... Stop asking about West Temple because the game it isn't based just in one map. We have superior dungeons, coc dungeons, different sets to farm for league or not, collectables and more. If you want a high exp, play a private server. So don't try to make a piece of cake game like brazilians did in Priston Tale....