Newbies. My observation is dates posted here usually align with eventual job actions. Of course, that's hard to say it is known by the source, since the bank is laying off so regularly, anyone could post the last wednesday of the month and be considered an insider or claravoyant. Until the bank changes their actions, why question the dates as legitimate? Let the yahooz running this company prove the dates wrong. So far they have not.
I'd profer one additional observation - I've seen the ax fall, which I'll call define as more than one employee canned on same day, (not contractors because they don't count, they deserve to be laid off) on days which were not announced on this site.