Mount Olivet Cemetery, Aurora, Kane County, Illinois, 60505 USA: Find a Grave Office Hours: Monday - Friday: 8:00 AM until 2:00 PM Saturday by appointment only Closed SundayThe first burials in Mount Olivet Cemetery were prior to 1850. The cemetery is a Diocesan Cemetery of the Diocese of Rockford, Illinois, and services the various parishes located in the southern Fox Valley area.