http://www.timeanddate.com/calendar/days/ http://www.timeanddate.com/calendar/days/ http://www.timeanddate.com/calendar/days/ There are seven days in a week timeanddate.com 这里的解释 http://www.timeanddate.com/calendar/days/ 24 Hours / 7 days a Week The Days of the Week it's not the same in all countries About the days of the week 24 Hours / 7 days a Week Sunday as the start Learn more about the days of the week http://www.timeanddate.com/calendar/days/ http://www.timeanddate.com/calendar/days/ timeanddate.com says https://www.timeanddate.com/calendar/days/