Available in both Plasma 6 (and >= 5.22).Your binary khameleon! A simple button that allows you to switch between two chosen Plasma Color Schemes. Not only day/night, but any scheme you want!Dead...
Just wanted to tell you that Day/Night Switcher has been finally ported to Plasma 6. I couldn't have done this with the interest by the community on the project's continuation. Anyway, let us all enjoy it.
I am only posting this in the hopes that old users who moved to Plasma 6 may catch up on the news.
I was using DynamicTheme before but it stopped working with Plasma 6. Didn't want to wait for someone to implement it so I wrote a little script to check the sunrise and sunset times for my location and change the global theme accordingly. A cron job runs the script every few minutes and the theme changes when applicable.