When is the Next Google Page Rank Update?

I am one of those bloggers who are always anticipating for the next Google Page Rank update. For some, it does not matter to them. But I would be hypocrite if I say that I do not care about it at all. Of course, I want a higher Page Rank. The higher, the better. It has been circulating online that the next Page Rank update will be on the last week of September. I'm crossing my fingers that I won't lose my PR. I will be happier if it will get much higher!