Perhaps because now they were finally supposed to update it, and not before now.

(I don't know this to be the case for sure, but I'd assume that, over them simply forgetting or not knowing how copyright law works.)

Read up on copyright law: https://www.copyrightlaws.com/copyright-symbol-notice-year/

Funny thing is we actually did this change three weeks ago!

It had become a meme yes... but hey we finally got there!

krtalvis

Why is the mobile client still saying 2018?

Yea my bad. I typed 2018 into the box. It will be fixed soon.