I need to set up a series of recurring events which normally follow a
fortnightly pattern as part of a school timetable. However, school holidays
make the process impossible to do beyond each term dates. How can I set the
schedule for the whole year?

I asked this question a couple of weeks ago but can't find either the
question or its reply anywhere in the discussion groups. Apologies! I believe
the reply referred to a commercial add-in that provided this feature but I
can't find it.

Any ideas?