I have to say, I was skeptical about dark mode in our current operating systems, but since wiring it up to switch to it automatically after sunset, I’m a believer. I know some people always operate their in dark mode, and that's not for me. I prefer the light on my screen to match the light of the day. It's especially nice to have my iPhone in dark mode at concerts, so I can avoid being "that guy" who blinds the person behind me, Websites now respect the system setting of dark mode, and ever since [Jeff Geerling updated his site's theme to support dark mode](https://www.jeffgeerling.com/blog/2018/jeff-geerlingcom-now-supports-dark-mode-macos-1014), I had on my list to do the same. It turns out that [the Responsive Blog Drupal theme](https://www.drupal.org/project/responsive_blog), a very nice theme that does what it says on the tin, has a switch for turning on the dark mode version of it. I'm glad I realized that most of the work had been done for me, and [I've submitted a patch to the project for review](https://www.drupal.org/project/responsive_blog/issues/3101081). The last frontier of dark mode based on system setting is third-party JavaScript widgets. None of the 3 widgets on my blog, to my knowledge, have the ability to switch automatically.