There is an indicative calendar for events in the tech regs, but it's not been strictly followed in recent years and is really a guide to start in attempt to avoid clashes.

http://www.aarcmcc.org/docs/AARCMCC%...s%20201501.pdf

Most events are decided around 6months out, so as far as next year is concerned more should be known for the bulk of the calendar by Feb or so.