For the sake of convention, we use the print form of time planning: the calendar. So that we are imagining our lives on a grid, to be connected to the big bang and everything between.
This is not a new thing. People kept diaries as they did indeed believe this grid needed filling and colouring.
And perhaps it does.
Technology can allow us to be less minutely careful, which is a great thing. To disparage your ancestors for being so careful is digusting, however.