What exactly does the Avast "remind me next century" option actually do?

Just tried pressing "Next Century" and "Ok" then set my clock forward 100 years minus 3 minutes. Waited 3 minutes and guess what:

it actually popped up again!

It just a joke from Avast. I pressed that button and they reminded me again the next day! It seems they saying: nobody will be there to remind you on that virtual date!