Members of the winter swimming club "Pirrlliepausen" go into Lake Senftenberg, which is four degrees cold (39 Farenheit) for their traditional Christmas swim, in Seftenberg, Germany, Friday, Dec. 24, 2021.. Since 1987, the "Pirrlliepausen" have been going into the water twice a week in winter. "Pirrlliepausen" is an old North German expression for "icicles". (Bernd W'stneck/dpa via AP), APTOPIX