Actually, whenever Verizon decides to send it out. There have been no "Formal" Announcements as to when it will be released by any carrier. Everything is an assumption right now. It may be Sunday, it may be Wednesday. It could be this month or next. The only thing we can do is to sit and wait. Once it's released, there will be tons of posts on the forum announcing it. But that doesn't me that you or I will be on the first wave of deployment. To release it to everyone at one time would swamp their servers.
The only thing we can do is to wait. Patiently. I've never seen a major OS upgrade that had a scheduled release date. Just an approximation.