Create an "average stream time" feature on the streamer's profile
It basically takes the stream times of the last 30 or 31 days and averages them to give a summary of when you stream. You can set which days are grouped together, so if you stream somewhere around 5-6 PM on weekdays and somewhere around 3-5 PM on weekends, then you can select Monday to Friday to be grouped together and Sat.-Sun. to group as well, and your stream times will show as 3-5 PM on weekends (or somewhere around that number), and 5-6 PM on weekdays. This is publicly visible, so that way it's an automated way to show viewers when you generally stream.