Yes @ allisom's question.
I go to edit the first post, click "Go Advanced" and it has what I want it to be changed to there (**OFFICIAL** PlayStation Plus Free/Sales Thread - Updated 6/11/13) but it won't update the original thread title.
LOL My question wasn't a yes or no one.
The thread has a title. It is "**OFFICIAL** PlayStation Plus Free/Sales Thread". If you look at the forum page with the thread listings, that is what you see. I gather now that you are not trying to change that.
The thread title is not "**OFFICIAL** PlayStation Plus Free/Sales Thread - Updated 6/11/13." That is the title of your first post in the thread.
As Virge said, titles can't be changed after a period of time, but it doesn't sound like you're trying to change the thread title, just the post title and I wasn't aware of a time restriction on that, although there may be.
If it won't alter any more, you may have to choose a post title without a date as I don't think any mod is going to be willing to change it for you every day or so. We can change it to your new chosen one and have it remain that. I don't know of another solution.