I’m not picking on anyone here. But I’m curious about the phrase, “all of the sudden”. I’ve seen it written this way several places recently and it just doesn’t sound right to me because I learned it as “all of a sudden”. I’m wondering if this is one of those regional things? I did a quick search online and found a couple references that claim the way I learned it is the “right” way. None of them attributed any particular origin to the phrase in either form. One diatribe went as far as stating,

…idioms are shaped by widespread usage, so that if enough people over a long enough period of time say “all of the sudden,” eventually that will become the preferred idiom, and someone many years hence will write an article deploring the fact that some benighted speakers and writers don’t know any better than to say “all of a sudden.”

But that day has not yet arrived, and until it does, the proper phrasing remains “all of a sudden,” and those who use “all of the sudden” will be marking themselves as imperfectly educated, or at the very least as careless in their use of language.

Wow. Calm down. [You can read all of that short article here.] I’m not on a crusade to change anyone’s speech pattern. Not on this point, at least. There are other mangled idioms that bother me far more. Still, if you… suddenly are willing to change, please do….

The origins of some phrases are inscrutable [clear as mud] while others are pretty obvious [crystal clear]. As I said, I’m curious whether this is regional. So, do you say “all of the sudden” or “all of a sudden” and where did you learn to talk like that?