change delivery field name

Hello,

im newbie here n i need help, i want to change the (postcode) field name to (delivery date).

i want it to be changed either as guest checkout or register checkout.

Best Regards.

Newbie or not, when requesting support, at a minimum, please supply the following information:

a. Your OpenCart Version.
b: The Theme used.
c. Aditional Mod's used, eventually, if a problem could be related to one of those.
d. A detailled information, why/where you plan to change Post Code to Delievery Zone.
The Post Code ist related to the Consumer, and the Delievery Date to an order. Therefore,
they have nothing in common, and cannot just be 'exchanged', just like that.

It's like going to a Doctor, without sufficient Information, he cannot help.
Nothing personal!
Ernie
ipc.li/shop/