Lifespan vs Seasons...How Many Years Will Your Sim Live?

Using potions of youth with mine, one has already had hers, her child and his girlfriend have gotten their first, so when the time comes, the one who has had her second will have lived an extra 48 days longer than she should of and the other two at minimum are going to live 24 days later than they should of. if their elder years increase and they get bonus days.

There you have the ability to stare the grim reaper in the face and say "not today buddy!" as he walks off arms down all dejected.