State v. Robbins
In State v. Robbins, 709 P.2d 771, 773 (Utah 1985), the Court imposed a duty on trial courts "to require the State to give the defendant the best information it has as to when the alleged crime took place." Id.
There, the Court disapproved of the State's unexplained amendment of its information to expand the dates when Mr. Robbins allegedly sexually abused a child beyond those in the original information for which Mr. Robbins had filed a notice of alibi.
The Court noted that "due process requires that an accused be given sufficiently precise notification of the date of the alleged crime so that he can prepare his defense." Id. at 772.