How to add current date in subcon order page

requirement is that:While creating sub con order from Subcontracting Order (16323) then POSTING DATE should take current system Date and same date should reflect on
Ord. Subcon Details Rcpt. List (16370) POSTING DATE
Page 16323 having source table purchase header(38)and 16370 having source table purchase Line 39
I don’t know how to achieve same