Change Hiring Date in SAP HR

There are Three Scenarios when you may need to change hiring date:
 
1) After payroll is run - when hiring date is before actual Hiring date.
2) After payroll is run when hiring date is after actual Hiring Date.
3) Before the payroll is run.
 
1) PA30 -- Copy actions infotype - action type - incorrect entry -- save and come out PA 30 copy actions infotype -- action type - correct entry - now correct your entries, save your date is changed.
 
2) PA30 - Utilities - change payroll status - delete accounted to feild, save and come out - then again utilities change entry leaving date - corrrect the hiring date - save and come out.
 
3) PA30 - Utilities change entry/leaving date change your date and save