Translation:For Shrovetide every child has got funny clothing on.
This is not only a Danish tradition but also a German one (and probably other European countries). In some parts of Germany children (and adults, too) disguise (for example as angel, pirate, clown and so on) and celebrate carnival like this.
"On" is also marked wrong. Is anyone from Duolingo looking at the errors anymore? I have reported on this question a few times and it still maks it wrong, as is the case with a few other questions. Months go by with no corrections.
Yeah. For whatever reason this particular awkward translation irritated me more than some of the others.