如何在javascript中获取年份的第一个日期和最后一个日期

Question

Need to get first date and last date of a year from passing only year number. It's almost look like below.

var year = 2016 //Any Year
var first_date = ? //From Year
var last_date = ? //From Year

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);

Answer 2

Generate using Date() method, either with valid date string

 var year = 2016 //Any Year var first_date = new Date('1 January ' + 2016 + ' 00:00:00') //From Year var last_date = new Date('31 December ' + 2016 + ' 00:00:00') //From Year document.write(first_date + '<br>' + last_date)

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Or as parameter like new Date(year, month[, day[, hour[, minutes[, seconds[, milliseconds]]]]]); format

 var year = 2016 //Any Year var first_date = new Date(2016 ,0,1) //From Year var last_date = new Date(2016,11,31) //From Year document.write(first_date + '<br>' + last_date)

Answer 3

do you want like this ?

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