Another option would be "get rid of real time and just use eorzea time." Have NPCs say "come back tomorrow" if they mean next game day or "come back in a month' if they mean a real life day. It's just always bugged me that in any mention of time, under the current system they have to specify (Earth time) or (Eorzea time) after any mention of time passing. It's an immersion break, albeit a small one.