JavaScript: Get Week Number for Year

Question

How to calculate week number from Date in JavaScriptAs you know there are approx 53 weeks in a year thus I want to week number from Datevar mydate  342025013134var weekNumber

dharmendr · Accepted Answer

Hi makenziexcRefer below example to calculate the Week NumberHTMLlthtmlgtltheadgt    ltmeta charset34utf834 gt    lttitlegtlttitlegt    ltstyle type34textcss34gt        body  fontfamily Arial fontsize 10pt     ltstylegtltheadgtltbodygt    ltinput type34button34 value34Submit34 onclick34GetWeekNumber34 gt    ltscript type34textjavascript34gt        function GetWeekNumber             var today  new Date            var startDate  new DatetodaygetFullYear 0 1            var weekNumber  MathceiltodaygetTime  startDategetTime  24  60  60  1000  startDategetDay  1  7            alert34Current Week number is 34  weekNumber            ltscriptgtltbodygtlthtmlgtDemoScreenshot DownloadsDownload Sample

JavaScript: Get Week Number for Year

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