[Issue] Replace {YYYY} in the copyright line by the current year

[m2-assistant]

This issue is automatically created based on existing pull request: #36754: Replace {YYYY} in the copyright line by the current year

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Follow up for #5004

Description (*)

So many people spend time updating the copyright in their Magento installations every year. We want to save this time by introducing a simple solution - add a variable that will be automatically replaced with a current year.

Related Pull Requests

#5004

Manual testing scenarios (*)

1. Set copyright string to Copyright 2013-{YYYY} in the design config
2. Clear caches
3. Check the frontend
4. It displays (in this year) Copyright 2013-2023

Questions or comments

A note about caching: The currrent year is evaluated when the page is rendered. As pages might be in the full page cache, the year will not immediately update in midnight Jan 01st 0:00. Mitigating this would cause a lot of problems and complicate the solution. For example we might not want to clear the full page cache automatically as this will slow down the page.

When a page is invalidated by other reasons (for example a product update), the copyright year will update as well.
So in the end of the day, the copyright year is current when a page was recently changed which is just what a copyright year is supposed to be. If a page is not updated for a long time, it's believed to be okay to have an older copyright year.

We also added a note to hint users who want a consistent up-to-date copyright year to clear the full cache.

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• README.md files for modified modules are updated and included in the pull request if any README.md predefined sections require an update
• All automated tests passed successfully (all builds are green)

[github-jira-sync-bot]

✅ Jira issue https://jira.corp.adobe.com/browse/AC-7806 is successfully created for this GitHub issue.

[m2-assistant]

✅ Confirmed by @engcom-Lima. Thank you for verifying the issue.
Issue Available: @engcom-Lima, You will be automatically unassigned. Contributors/Maintainers can claim this issue to continue. To reclaim and continue work, reassign the ticket to yourself.

[sandy6666]

@magento assign this to me

[sandy6666]

@magento I am working on this