Fifty-five-year-old Frederick Massey was arrested last year in connection with inappropriate sexual contact with the girl in a wooded area near Redden State Forest.
Massey Friday also gets credit for 239 days served, and his sentence would be followed by home confinement and intensive probation.
He pleaded guilty last month to one count of third-degree rape.
Police said Massey met the girl in the fall of 2012.
He was a custodian at Shields Elementary School in Lewes.
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