Earlier quoted context omitted.
The original Chinese website has a more recent 2024 copyright and much more content: https://www.vmos.cn/ - copyright years on websites are completely useless, people should stop doing that. That repos haven't been pushed in a number of years is slightly supsicious, although they could just have taken things internal. (Open source licenses do not require pushing to public github, only that someone obtaining the appli…
Depending on jurisdiction, having a year on your copyright that is correct and accurate is required for maintaining any copyright on that content.
The purpose of dating work is so that if your copyright is contested, you will have evidence that you created the work first. This is done by obtaining an officially recognized dating, which is usually done through registration with the copyright office (the registration has no other legal purpose after the Berne convention was adopted). External evidence or dating can also be used, e.g. having mailed the work to yourself and thereby having the work dated by the post office, having music be on hitlists, etc.
Writing the date on the work yourself has no value whatsoever. Dynamically injecting the current year has negative value as you are undermining the age of your work and thereby harming your ability to defend it as being the work first created.
In the case of a website, the only valuable evidence in proving the age of the content would be external content references and archive.org scapings.