Apparently it depends on whether you care about when the project enters public domain.
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- [No](#no)
- [Yes](#yes)
- [Other links](#other-links)
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## No
- [Copyright without years | daniel.haxx.se](https://daniel.haxx.se/blog/2023/01/08/copyright-without-years/)
- [Do you really need to update the copyright statement each new year? - nexB](https://nexb.com/do-you-really-need-to-update-the-copyright-each-new-year/)
## Yes
- [Information for maintainers of GNU software, 6.5: copyright notices](https://www.gnu.org/prep/maintain/maintain.html#Copyright-Notices)
- At the time of writing they practically say to update every file that has more than 10 lines.
## Other links
- [OpenSource StackExchange: mit - How do the years specified in a copyright statement work? - Open Source Stack Exchange](https://opensource.stackexchange.com/questions/6389/how-do-the-years-specified-in-a-copyright-statement-work)
