the forty-ninth day after a person dies / the Buddhist memorial service that occurs forty-nine days after a person dies

vicissitudes, the way that the world or a person prospers one day and declines the next

一栄一落: vicissitudes

You should treasure every encounter, for it will never recur.

dotting the i's and crossing the t's

successive series of questions and responses

a lucky day, auspicious day

(rare) one's birthday

Saturday

(rare) a birthday