[META] Is there any way we could have a flair for ended giveaways?

I'm no programmer. I have no clue how this would work. But is there a way to set it so that when the giveaway ends, the post's flair would change to ENDED or something? Maybe the OP could set the day that the giveaway ends, and it would automatically change the flair once that day hits? This is probably way out of the scope of Reddit and flairs, but I thought I'd bring it up.

EDIT Oh I just thought of another way! Maybe we can all start putting the end date directly in the title?