My company recently developed a WordPress plugin that builds on the earlier solution. It’s called “Advanced Dates”:

http://wordpress.org/extend/pl.....ced-dates/

… and allows publishers to easily modify dates on posts and pages, setting them in the past or far into the future.

I came up with these two easy-to-integrate solutions:

http://studiohyperset.com/word.....ction/3102

Thanks for your interest in, and work toward a solution for, this issue.