In this tutorial I will tell you to edit the footer of your vBulletin forum so that YEAR in the footer changes automatically so that you can to New Year Party on December 31 instead of editing your footer copyright notice.
It is only four step process, see the screenshots below.
Login to AdminCP and go to (Step 1 and 2) Settings > Options > Site name / URL / Contact Details and scroll down to the bottom of the page and you will see "Copyright Text" field. Edit the code below for your site and copy and paste (Step 3) it in the "Copyright Text" field. Click Save (Step 4).
PS. Do not forget to edit the text in the green color in the code below.