All the cruise lines will have many kids March 11 to March 20 and Feb 18 to Feb 26 as those are both spring breaks for many university students and March break for elementary and secondary students in Canada anyhow. We always travel during March break and even start some cruises just prior to March break. If you are trying to avoid hordes of children (we are not), you should avoid the above weeks. Perhaps Holland America will have less. But I have travelled most of the lines during the above weeks for years and years and they are jam packed with kids. So is Xmas week too.