On Tomorrow

After moving from Chicago down to northeastern Georgia, I have noticed an extremely vexing trend among many of the native Southerners. The phrase “on tomorrow,” i.e. “We will have a staff meeting on tomorrow.” The first time I heard this spoken out loud I assumed it was a mistake; when I continued to hear the words spoken from several different, well-educated, people I assumed it must be dialectal. “On yesterday” has also found itself crept into everyday conversation…

Has anyone ever heard (or spoken) such a phrase? Is this a Southern thing? It just sounds unnatural to me and I do not understand why it is deemed necessary to put the preposition in front of tomorrow (and sometimes yesterday). “We will have a staff meeting tomorrow” sounds just fine to me.