The schedule does not come out until late fall, if I remember correctly, and is not finalized until after the annual meeting. Usually, unless something drastic happens, races are scheduled on the same weekends as the year before. Track schedules are pretty tight and between all the various events, series and what have you, there is not a lot of flexiblity.
SARRC race dates are typically not changed unless necessary and only after it is discussed and agreed on.
Is there a specific race date you are trying to confirm? Let me know and I'll see what I can find out.