It's been a long time since I did any subtractions of dates, and would
much appreciate a little help please. In particular, what is the
simplest way of finding the period that's elapsed bewteen two
date/times? Of course, I would want to display it in the most common
sense format, across a wide range. Must I convert each date first,
subtract and then convert back, or can it be done in one formula?

Is there ever any practical application for *adding* two date/time
values?

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Terry, East Grinstead, UK