Adding the current year in message template

Summary

I need the current year to display in message template

Content

Hi, 

I have a year in the footer, I want the current year to show in the footer in message template. Should I use JavaScript for that? Is there a better option?
For example I want to say "2021 This is a test" and when the next year is 2022 I want the year to auto update.

Thank you

Version

21A