Many payroll providers require a person's contract 'Hours per week' . This can be determined through the working hours associated with a calendar and a person's employment details, by deriving the working hours per day from the calendars, but the changes to a person's working hours over time can not be determined due to the lack of date effectivity with the calendar association.

• Enable date effective the management of the calendar (and therefore work hours) through the Employment Date manager so that changes to a persons work pattern over time can be tracked in this interface

• Display the derived weekly working hours from the person's calendar as a read only field on the Employment Details form
• Display the derived weekly working hours from the person's calendar as a read only field on the Employment Date Manager form
• Make changes to the payroll interface API to include the 'Hours per week' as a decimal field with 2 decimal points.