Korean Air Skypass - Fly a day earlier than ticketed?

I am flying ICN-DPS next month. There is 1X flight a day and wouldn't mind flying out 1 day earlier. Is there any way to do this? My ticket is restricted and it isn't necessary but if it's possible, I'd like to do so.

well if the tkt is restricted then you most likely will have to pay a penalty if the tkt allows you to do that otherwise you wll have to buy a brand new tkt.

IF you know someone in KE ticket counter, it can be possible.

Otherwise, there will be a penalty..

Thank you for the responses. I already took that flight but it's good information to know for the future.