如何在javascript中获得第一天和最后一天

Question

需要获得一年的第一天和最后一天仅通过年份数.它几乎就像下面一样.

var year = 2016 //Any Year
var first_day = ? //From Year
var last_day = ? //From Year

例:

// Fist day is Thursday and last day of that year is Sunday.

Answer 1

var year = 2016 //Any Year
var first_date = new Date(year, 0, 1);
var last_date = new Date(year, 11, 31);

document.write(first_date);
document.write("<br/>");
document.write(last_date);