One option would be to use the solution from #11, so:
in the Days field we include how many days there should have been (4 in this case)
we write in what the division start lists should have been (either the finish order from the previous year, or adjusted to account for the getting on race if it happened)
for the results we just include a 't' character per division per day.
That way when you visualise multiple years, the skipped year will be shown but with no effective results.
We have some automatically generated results files which have no results in them. For example, this Torpids result from 2014.
Note that it's missing the gender, number of days and starting order. All these were available for this event but we haven't passed them on.