var Day = new new a Date (2018,10,0); // last parameter is 0, which means the acquisition in October 2018 a total of how many days console.log (day.getDate ()); // 31
var Day = new new a Date (2018,10,0); // last parameter is 0, which means the acquisition in October 2018 a total of how many days console.log (day.getDate ()); // 31