Upvote:5
Time in DN 16, MahaParinibbanaSutta, is already clear for the Sutta Pali memorizer, but it's hard for the reader because it's too long for skipping reading. Memorizing with the memorized & enlightened monk is the way to study tipitaka faster&easier really really.
In DN 16...
As we knew whether Sariputta died 6 months, fullmoon day on 12th month, before the Buddha died, full moon day on 6th month. The Buddha announced his dead date 3 months before the death, so Ven. Sariputta died before the Buddha 6 months.