You know this old tactic of "tell us exactly when" is pretty boring.
Why would I need to know the exact day, when I can trade whatever I see in front of me.
If YOU really want to learn about forecasting volatility with that kind of accuracy, you first need to develop a math background that includes GARCH. Since I am guessing you don't know shit... you can start by looking up reference to Tim Bollerslev, George Levy, and Engle.
If at some point in the decade you start to understand the Levy process and perhaps read even ONE book on the subject, we might have a conversation that YOU understand.
Tell you what Einstein, lets cut right to the chase. Here's list of references. I am SURE that you have read most these. Come back to me with some intelligent questions and I will go back and forth with you.
Anh, V. V., Heyde, C. C. and Leonenko, N. N. (2002). Dynamic models of long-memory processes driven by Lévy noise. J. Appl. Prob. 39, 730--747.
Barndorff-Nielsen, O. E. and Shephard, N. (2001). Non-Gaussian Ornstein--Uhlenbeck-based models and some of their uses in financial economics (with discussion). J. R. Statist. Soc. B 63, 167--241.
Barndorff-Nielsen, O. E. and Shephard, N. (2001). Modelling by Lévy processes for financial econometrics. In Lévy Processes, Theory and Applications, eds O. E. Barndorff-Nielsen, T. Mikosch and S. Resnick, Birkhäuser, Boston, pp. 283--318.
Bertoin, J. (1996). Lévy Processes. Cambridge University Press.
Bertoin, J. and Yor, M. (2002). On the entire moments of self-similar Markov processes and exponential functionals of Lévy processes. Ann. Fac. Sci. Toulouse Math. (6) 11, 33--45.
Bollerslev, T., Engle, R. F. and Nelson, D. B. (1995). ARCH models. In The Handbook of Econometrics, Vol. 4, eds R. F. Engle and D. McFadden, North-Holland, Amsterdam, pp. 2959--3038.
Bougerol, P. and Picard, N. (1992). Stationarity of GARCH processes and of some nonnegative time series. J. Econometrics 52, 115--127.
De Haan, L. and Karandikar, R. L. (1989). Embedding a stochastic difference equation in a continuous-time process. Stoch. Process. Appl. 32, 225--235.
By all means let me know when you want to start "discussing" the exact timing of changes in volatility for the market of your choice.
Can't wait to "get it" directly from you.
Steve