- Mr. Joseph Franklin of the U.S. Council of Standards and Measures: The Metric Leisure Week will be composed of three days. Yes, only three days. Monday, Tuesday and Wednesday will become one day known as Mwensday or in decabet: Mwen. Thursday, Friday and Saturday will become Saturthurs, or in decabet: Turth. And Sunday, our traditional day of rest, will remain Sunday. Three days: Mwen, Thurth and Sunday.