I could be wrong about these, so take it with a grain of salt, but here's a list I put together. I spent way too much time trying to figure this out.
House of Representatives: August (I'm not sure if there is any specified date?)
President: October (date?)
SouthGovernor: November 18
Chamber of Delegates: September 23
Class I Regional Senator (Pingvin): October 14
Class II Regional Senator (Tmthforu): August 12
FremontAssembly: September 8
Governor: September 8? (the dates seem to be asymmetric?)
Class I Senator (JoMCaR): October 13
Class II Senator (Goldwater): August 11
NorthGovernor/Legislature: I don't know.
Class I (Blair): October 14?
Class II (cxs018): August 12?