I woke up too early this morning due to a telephone call . Keep in mind it is Saturday and after a long hard , demanding and stressful week at work , I looked forward to sleeping in . Yea , just for the purpose of documenting where this meal was in the continuum of my life , I must state that the hospital where I work just successfully went through an unannounced JCAHO survey . ( That 's where we prove we meet their standards and deliver quality , safe healthcare . )

Based on the preceding passage, answer the following question Why is the narrator so tired on a Saturday ?
The narrator 's employer had a rough survey to do .