SAP Note 28566 - Maternity E W C is wrong when due date is Sun

Symptom:

When the stated due date is entered as a Sunday, the SMP record (infotype P0088) sets the Expected week of confinement back to the previous Sunday. As well as the EWC the other generated display fields are also a week out.

Cause and prerequisites

The previous sunday should only be used when the expected birth date is anything other than a sunday.

Solution
Apply the following code change to overcome the problem.