Criminal Law Questions? Ask a Criminal Lawyer.
No, it is not reasonable. You are supposed to be summonsed for court within a reasonable time for you to respond and prepare for trial. So your attorney should be able to request a continuance, especially since you are not even in town.
I am confused by one thing, however. The DAs generally do not have control over a court's docket and when cases are tried. That is usually within the discretion of the court, not the prosecutor. So the prosecutor should not be able to force your case to court like that. Only the judge really has the power over his/her own docket.