In Germany, June 27 is Siebenschläfertag (Seven Sleepers Day). If it rains that day, the next seven weeks or the rest of summer is supposedly going to be rainy. While it might seem to refer to the Siebenschläfer rodent (Glis Glis), “edible dormouse” in English, it actually commemorates the Seven Sleepers legend. Objections have been raised that the legend might have arisen before the Gregorian reform and as at this time the difference to the Julian calendar amounted to ten days, July 7 would be the actual Seven Sleepers Day. Based on this date the prediction has a slightly increased probability, confined to the southern parts of Germany not affected by the jet stream.
