It rained heavily on and off most of yesterday and I overheard someone on the bus commenting that it was a “duvet day”. I don’t remember hearing this expression before, but from the context I thought she meant that because the weather was so unpleasant, she would prefer to spend the day under her duvet rather than going to work.
According to Wikipedia, a duvet day is a day off from work you take when you’re not sick and don’t have other reasons for staying at home, but just feel like a break. Some people apparently have the right to such days in their contracts. The Phrase Finder adds that this practice dates back to the 1960s and that the phrase first appeared in print in 1996.
Does this concept exist in your country? Are you allowed to take duvet days?