Showing dates on the list of problems, comments, in permalinks and not shown in individual problem pages. This allows date to be easily accessible to where its needed and who needs it while not showing in the areas where it might inhibit someone from posting their solution just because the problem was posted a long back.

It's hard for new users to understand that the lifetime of content on needgap is very long, Solutions are needed for a problem posted two years ago because the need-gap exists. Unfortunately, limited attention and instant gratification nature of average Internet content today makes it difficult to run home this point.