When I was writing my kpop romance, I was posting on a day that worked for my writing schedule, which I think was a Monday. So, I could work on the weekend and upload it for Monday morning. I released the new episodes at the same time, 8am, to keep it consistent. I figured wherever my readers were, they'd get used to the regular day and time releases within their time zone.
I also picked a day and time that worked for me to make sure I would be able to keep to the schedule and get it done on a regular basis. I think that works the best. People will adapt to a consistent schedule that you set, no matter what it may be. So, I suggest, setting something up that works for you and then sticking to it. If it isn't working though, make adjustments, and then just let your readers know.
So, just my two cents.