What time does Bloody harvest start?
porbably like the other events so far, 3 pm pdt.
Not until Oct 24th and, as suggested above, likely by 3pm PDT. There will be a formal announcement in the News section which should have the details. Until then, trailer here:
BTW fixed your formatting; try to avoid starting a line with four spaces - it will totally mess up any posts much longer than your current one.