Well, as I said in the other thread, in theory that will work. In practice, monkeying with statement dates can cause odd behavior by Chase computers, like extra short-month statements on unexpected dates in the early months of the account. A 12/31/16 statement out-of-the-blue might be very unwelcome if you rely on rigid comments some people made about finishing the bonus spend in December after that month's statement has dropped.

I have been watching this for years. I would not count on anything being 100%.

You also cannot count on specific dates anyway. I once went through years of WN Visa statements and found that my drop dates varied from the 13th to the 16th at least. This seemed to be related, but not 100%, to weekends and holidays.

I suppose you are pretty safe if Chase sends you a specific PM about it.