Comments on: Get the week number with JavaScript http://syn.ac/tech/19/get-the-weeknumber-with-javascript/ Syn.acK - Reviews and help about anything Mon, 07 Nov 2011 19:25:18 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Julien de Prabère http://syn.ac/tech/19/get-the-weeknumber-with-javascript/comment-page-1/#comment-208 Julien de Prabère Mon, 07 Nov 2011 19:25:18 +0000 http://syn.ac/common/19/get-the-weeknumber-with-javascript/#comment-208 After cheks, your program does not need a correction for summer time but is wrong, for example in 2010, with one week too much all year long... After cheks, your program does not need a correction for summer time but is wrong, for example in 2010, with one week too much all year long…

]]> By: Julien de Prabère http://syn.ac/tech/19/get-the-weeknumber-with-javascript/comment-page-1/#comment-207 Julien de Prabère Mon, 07 Nov 2011 01:02:50 +0000 http://syn.ac/common/19/get-the-weeknumber-with-javascript/#comment-207 I propose this function, which takes into account the summer(daylight saving) time ! Date.prototype.getWeek = function() {var i,d,firstWeekMonday; var i=1;while (new Date(this.getFullYear(),0,i).getDay()!=4) i++;// i the first Thursday; var firstWeekMonday = new Date(this.getFullYear(),0,i-3,0,0,0,-1);// one millisecond before d=Math.ceil(((this.valueOf()-firstWeekMonday.valueOf()-(this.getTimezoneOffset()-firstWeekMonday.getTimezoneOffset())*60000)/86400000)/7); return d?d:new Date(this.getFullYear()-1,11,31).getWeek(); } I propose this function, which takes into account the summer(daylight saving) time !

Date.prototype.getWeek = function() {var i,d,firstWeekMonday;
var i=1;while (new Date(this.getFullYear(),0,i).getDay()!=4) i++;// i the first Thursday;
var firstWeekMonday = new Date(this.getFullYear(),0,i-3,0,0,0,-1);// one millisecond before
d=Math.ceil(((this.valueOf()-firstWeekMonday.valueOf()-(this.getTimezoneOffset()-firstWeekMonday.getTimezoneOffset())*60000)/86400000)/7);
return d?d:new Date(this.getFullYear()-1,11,31).getWeek();
}

]]> By: ray http://syn.ac/tech/19/get-the-weeknumber-with-javascript/comment-page-1/#comment-195 ray Fri, 04 Feb 2011 16:48:38 +0000 http://syn.ac/common/19/get-the-weeknumber-with-javascript/#comment-195 I been looking for a weekly script. What is the code to display the current week on the page. document.write? thx I been looking for a weekly script. What is the code to display the current week on the page. document.write?

thx

]]> By: Lasse Ebert http://syn.ac/tech/19/get-the-weeknumber-with-javascript/comment-page-1/#comment-180 Lasse Ebert Tue, 05 Oct 2010 22:10:03 +0000 http://syn.ac/common/19/get-the-weeknumber-with-javascript/#comment-180 Thanks! Thanks!

]]> By: Monty http://syn.ac/tech/19/get-the-weeknumber-with-javascript/comment-page-1/#comment-175 Monty Sat, 04 Sep 2010 19:19:44 +0000 http://syn.ac/common/19/get-the-weeknumber-with-javascript/#comment-175 It doesnt work, for the date of 9/4/2010 it gives 35, its 36.... It doesnt work, for the date of 9/4/2010 it gives 35, its 36….

]]> By: NielsNL http://syn.ac/tech/19/get-the-weeknumber-with-javascript/comment-page-1/#comment-170 NielsNL Wed, 12 May 2010 14:53:41 +0000 http://syn.ac/common/19/get-the-weeknumber-with-javascript/#comment-170 Thankyou very much needed this badly Thankyou very much needed this badly

]]> By: Jimbo http://syn.ac/tech/19/get-the-weeknumber-with-javascript/comment-page-1/#comment-146 Jimbo Thu, 04 Mar 2010 09:26:38 +0000 http://syn.ac/common/19/get-the-weeknumber-with-javascript/#comment-146 VDE is correct, the last week of 2009 and first week of 2010 are technically the same week number (if im not mistaken, that would be week 53) And week 1 of 2010 should start on 3 Jan 2010 VDE is correct, the last week of 2009 and first week of 2010 are technically the same week number (if im not mistaken, that would be week 53) And week 1 of 2010 should start on 3 Jan 2010

]]> By: Praveen http://syn.ac/tech/19/get-the-weeknumber-with-javascript/comment-page-1/#comment-141 Praveen Tue, 16 Feb 2010 10:04:17 +0000 http://syn.ac/common/19/get-the-weeknumber-with-javascript/#comment-141 Thanks, this function is very useful Thanks, this function is very useful

]]> By: Andrey http://syn.ac/tech/19/get-the-weeknumber-with-javascript/comment-page-1/#comment-131 Andrey Fri, 15 May 2009 12:51:17 +0000 http://syn.ac/common/19/get-the-weeknumber-with-javascript/#comment-131 Very useful function. Thank you. Very useful function. Thank you.

]]> By: vde http://syn.ac/tech/19/get-the-weeknumber-with-javascript/comment-page-1/#comment-129 vde Mon, 27 Apr 2009 12:28:51 +0000 http://syn.ac/common/19/get-the-weeknumber-with-javascript/#comment-129 Hi. I tried your script but I found a bug. The 2009-12-31 return 53th week, but 2010-01-01 return 01 week against 53th week. The transition between 2 years must test the number of day of the first week. If 2010-01-01 >= friday then first week begin the next monday. Hi.

I tried your script but I found a bug.

The 2009-12-31 return 53th week,
but 2010-01-01 return 01 week against 53th week.

The transition between 2 years must test the number of day of the first week.
If 2010-01-01 >= friday then first week begin the next monday.

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