Final Fantasy Hacktics

I've been wondering if there is any way to make the count of days when you travel from one place to another more than one day. eg from igros to mandalia in like two or three days.

Well, you could make an ASM hack and while it wouldn't be that hard, you'd very likely need kanji space for the path/days table...
I just don't see how it would be useful or add gameplay value other than speeding up propositions.