I'm looking for information on a certain topic, but there's been an explosion of forum discussion about it quite recently that's not relevant to what I'm trying to find. I'd like to eliminate this from my results by searching only for pages posted before a specific date.
Google Advanced Search has a date option that allows you to eliminate posts older than a certain age by selecting past 24 hours, past week, past month, or past year. I'd like the opposite of that. I'd like to eliminate any pages posted in the past six months. Is there a way to do this in Google, or any other major search engine?