%!demo
%! ## The colon operator builds a range of datetimes; the step is a `duration`
%! ## or `calendarDuration`.  A `caldays` step gives one row per calendar day.
%!
%! datetime (2024, 1, 1) : caldays (1) : datetime (2024, 1, 4)

%!demo
%! ## Use a time-based step for a finer range — here every six hours.
%!
%! datetime (2024, 1, 1) : hours (6) : datetime (2024, 1, 1, 18, 0, 0)
