Complex sentence: The Zapfenstreich is performed only on the occasion of national celebrations and solemn public commemorations, to honour distinguished persons at such special events as the leave-taking ceremony for a German federal president, and at the conclusion of large military exercises.
Split into simpler sentences: The Zapfenstreich is performed only during national celebrations and solemn public commemorations, to honour distinguished persons present at such special events. Examples are the farewell ceremony for a German federal president, or at the conclusion of large military exercises.