We are going through our site analysing the SEO. I find that sometimes on a google results page, some results show a date, others don't. Example (from same query):

I prefer the result not to have the date in it, as 20 Oct 2009 probably has an adverse effect on the clickability of the result.

Is this Google putting it in? Or the page itself? Or a combination of both (IE, if over a certain age, it includes date).

The two URLs are:

http://www.scirra.com/forum/perlin-noise-plugin_topic38498.html

http://www.scirra.com/forum/dungeon-maze-generator_topic40611.html

Any way to remove the dates? I'm thinking, if the age of the thread is > 4 months don't display the date on the page, then Google might not find a date reference for it?