I am trying to interpret a spreadsheet written by someone else (who is not available to explain the logic to me), and I came across this formula:

=[@[Due Date]]

I have no idea what this does. There is a column in the table with a heading "Due Date", but there is no named range with that name. The formula returns a date, but how? What is the "@" operator, and the square brackets?

Thanks in advance for advice.

OM1950