Some things I just don't understand

Yesterday when I saw our landlord (who lives upstairs) she gave me a big ugly chocolate bug. For the first of May, she said. Sure enough, I looked and saw it was called a Maikäfer, which is evidently a "May bug":



So I asked her if this has any special meaning (not an unreasonable question when someone gives you a chocolate bug), and she replied with something like: "Oh, yes. The 1st of May is a holiday, and we don't work that day, and we give this to each other." Well, that's much clearer. (In fairness, she was trying to explain in English.) Just when I think I'm getting a handle on how things work around here...