Question

171

How to get first date and last date of the week from week number and year?

rated 0 times [ 172] [ 1] / answers: 1 / hits: 20225 / 13 Years ago, tue, january 10, 2012, 12:00:00

In JavaScript I want to get first date of the week and last date of the week by week number and year only.

For example if I my input is:

2(week),2012

Then my output should be:

2012-01-08 and 2012-01-14

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samara

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4 Years ago

answered 13 Years ago jazminkyrap · Accepted Answer

Try this:

var year = 2012;

var week = 2;

var d = new Date(Jan 01,  + year +  01:00:00);

var w = d.getTime() + 604800000 * (week - 1);

var n1 = new Date(w);

var n2 = new Date(w + 518400000)



console.log(n1);

console.log(n2);

n1 contains the first day of the week

n2 contains the last day of the week

As for the constants:

604800000 is one week in milliseconds

518400000 is six days