sap treasury securtities - Treasury Calender

Hi Friends,

i

pls see the atttachment

i need to pay the coupon  as on due date  23.07.2015

but due to any unexpected holiday , now i will pay the  same coupon as on 24.07.2015 ,

Which t.code should i use ?

1. FWZE MANUAL DEBIT POSTION

2. FWBS- MANAUL POSTING

MAIN POINT

1. How to change the date from 23.07.2015 to 24.07.2015(due to holiday)

2. As date will be change , obviously , i have to pay the interest one day extra interest (means according 24.07.2015) ?

Post vl date            Update type          update type text                                  status                amt                  days    due date