Early in January of this year, I came across a 1974 calendar that I had stowed away in my closet. The days correspond exactly to those in 2019. So I decided to reuse the calendar, as I have done with previous old calendars. (Talk about a cheapskate! See my chapter on economy in The Girl From Copenhagen.) On this particular calendar, my mother had noted birthdays, doctors’ appointments, dates when taxes were due, and other salient things she had to…..