I remember one day in 1987 thinking how one day (perhaps in 2011) I would need to remember the events of that day for a poem I had to write in (maybe) 2011 (or 12). And I remember thinking I must remember what happened that day however insignificant it seemed at the time.
Memory always matters.
But I forgot everything. The diary was burned. The tape has been wiped. The blackboard has been cleaned. Etc. Etc.