Maybe add a hint on what time most people have been on the site, or show a distribution of number of people vs. time. Bonus if there's an option to change time

Maybe add a hint on what time most people have been on the site, or show a distribution of number of people vs. time. Bonus if there's an option to change time zone. Right now, it is 0357 where I am (UTC+1). I'm not sure who visits your site the most, and what time zone they are in.