For Hester Prynne, it's always a red-letter day.
Now, I'm quite sure this line isn't original with me (it couldn't be, right? it's too obvious), but I don't remember ever hearing it from an outside source. So I'm claiming it here.
If you can prove to me that it's been mentioned someplace I'm likely to have seen, please point it out to me in the comments.
If not, you have to cite me when using this joke. Tedious, isn't it?