Planned more than once
Anniversaries and surprise parties
The hardest part of a surprise is not the surprise. It is everything that has to be arranged around someone without them noticing — the flowers, the wine, the cake, the catering, the timing with the captain, and a cover story that holds until the last minute.
One tenth anniversary was arranged with the husband over weeks while his wife believed they were going out for dinner nearby. Another was arranged the other way round, by a wife, with the children aboard.
Aboard An evening or a full day Arranged in confidence