You may want to change the Copyright section of your locked email footer, to reflect the new/current year.
Whilst you can't amend locked footers like you can standard text snippets, you can make simple amends like this in the source code by following the steps below.
Firstly, open up the source code in your template, by going into Content mode and clicking Edit HTML:
Then you can type CTRL + F to search the code for the previous year, e.g "2024", and this will bring up the relevant text in the HTML that we need to edit:
Finally, change the text so it shows the new year, e.g. "2024" becomes "2025", then click save in the top right hand corner:
Now your locked footer will show the correct year!