In software engineering, it often said that, once the task is repetitive🙄, automate it! So must the © Copyright Date on the footer be automated.

Footer holds details such as Sitemap, Social Links and Copyright Notice of a site.
Eg.
src: https://www.godlife.com/en

Approach 1

Introduce a JavaScript tag with internal Date API. You can get the current year from the browser JS API, which means you don't have to change every other year.

• Add the JS script to your HTML

 Date().getFullYear());

• Introduce a script tag in your Footer Section.

<p>
   &copy
   <script>
      document.write(new Date().getFullYear());
   </script> 
   <a href='https://twiter.com/saviour123>Saviour Gidi<a/>
 </p>

Output

© 2019 Saviour Gidi

Approach Two

Introduce a script tag with AJAX and get the current Date from World Clock.

<p>
  &copy
  <p id='copyright'></p>
  Saviour Gidi
</p>

<script>
    fetch('http://worldclockapi.com/api/json/utc/now')
      .then(data => data.json())
      .then(d => 
      document.getElementById('copyright').innerHTML = (new Date(d.currentDateTime).getFullYear())
)
</script>

NB: This second approach is to a response in the comments.

Imagine every year you have to manually change the date on the website. It's not safe for your health and your company's and I pity you🤣. To cut long story short, update your code to include the JS tag!