3,026 years from today, life will either be really good or really bad.

Try this one at a party:

Ask some people "what is 100 minus 1?"

Next, ask them "what is 45 plus 44?"

Good one

Edit: This joke won't age well because once it has passed 5050 It will no longer be about the future and uncertainty because it will be about the past.

Edit 2: kinda like how hindsight is 2020. It is now, because we know what happened then. And we are quite unlikely to forget it.