Self-plug for something I wrote some time ago - you can use redshift-scheduler ( <a href="https:&#x2F;&#x2F;github.com&#x2F;spantaleev&#x2F;redshift-scheduler&#x2F;" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;spantaleev&#x2F;redshift-scheduler&#x2F;</a> ) to set up a custom schedule (ultimately using redshift to set the screen temperature).