You can negotiate a deadline, a price or a curfew. You can’t negotiate with time.

Nearly every limit in your life has somebody standing behind it, which is why it can be discussed. Time has nobody behind it, no appeal process and no discount for effort or good reasons. That is what makes it the one constraint worth planning around instead of arguing with.

Take the thing you have been hoping to be granted more time for and cut it down to fit the time that exists. Shorter, smaller, fewer. Planning for the hours you actually have is less satisfying than hoping and a great deal more effective.