How to get first and last day of the current week in JavaScript

Question

I have today   new Date    object  I need to get first and last day of the current week  I need both variants for Sunday and Monday as a start and end day of the week  I am little bit confuse now with a code  Can your help me

User · Answer

The excellent  and immutable  date-fns library handles this most concisely  const start   startOfWeek date   const end   endOfWeek date    Default start day of the week is Sunday  0   but it can be changed to Monday  1  like this  const start   startOfWeek date   weekStartsOn  1    const end   endOfWeek date   weekStartsOn  1

User · Answer

Nice suggestion but you got a small problem in lastday  You should change it to    lastday   new Date firstday getTime     60   60  24   6   1000

User · Answer

Small change to  Chris Lang answer  if you want Monday as the first day use this    Date prototype GetFirstDayOfWeek   function         return  new Date this setDate this getDate   - this getDay     this getDay      0   -6 1         Date prototype GetLastDayOfWeek   function         return  new Date this setDate this getDate   - this getDay    7        var today   new Date     alert today GetFirstDayOfWeek      alert today GetLastDayOfWeek       Thaks  Chris Lang

User · Answer

You could do something like this  var today   new Date    var startDay   0   var weekStart   new Date today getDate   -  7   today getDay   - startDay    7   var weekEnd   new Date today getDate      7 - today getDay   - startDay    7     Where startDay is a number from 0 to 6 where 0 stands for Sunday  ie 1   Monday  2   Tuesday  etc

User · Answer

You can also use following lines of code to get first and last date of the week   var curr   new Date  var firstday   new Date curr setDate curr getDate   - curr getDay      var lastday   new Date curr setDate curr getDate   - curr getDay   6      Hope it will be useful

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Although the question is seeming as obsolete I have to point out a problem  Question  What will happen at 1st January 2016   I think most of the above solutions calculate start of week as 27 12 2016  For this reason I think  the correct calculation should be like the below simply   var d   new Date        dayInMs   1000   60   60   24      weekInMs   dayInMs   7      startOfToday   new Date d getFullYear    d getMonth    d getDate    valueOf        todayElapsedTime   d valueOf   - startOfToday      dayDiff   d getDay     dayInMs      dateDiff   dayDiff   todayElapsedTime          finally     startOfWeek   d valueOf   - dateDiff      endOfWeek   startOfWeek   weekInMs - 1

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x000D   x000D  var currentDate   new Date    var firstday   new Date currentDate setDate currentDate getDate   - currentDate getDay     toUTCString    var lastday   new Date currentDate setDate currentDate getDate   - currentDate getDay     7   toUTCString    console log firstday  lastday  x000D   x000D   x000D   I m using the following code in but because of  toUTCString   i m receiving the following error as show in image  if i remove  toUTCString    output which i receive is not as expected

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krtek s method has some wrong I tested this  var startDay   0   var weekStart   new Date today getDate   -  7   today getDay   - startDay    7   var weekEnd   new Date today getDate      6 - today getDay   - startDay    7     it works

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I recommend to use Moment js for such cases  I had scenarios where I had to check current date time  this week  this month and this quarters date time  Above an answer helped me so I thought to share rest of the functions as well   Simply to get current date time in specific format          case  Today           moment   format  DD MM YYYY h mm A             case  This Week             moment   endOf  isoweek   format  DD MM YYYY h mm A      Week starts from Sunday and ends on Saturday if we simply use  week  as parameter for endOf function but to get Sunday as the end of the week we need to use  isoweek            case  This Month             moment   endOf  month   format  DD MM YYYY h mm A             case  This Quarter             moment   endOf  quarter   format  DD MM YYYY h mm A      I chose this format as per my need  You can change the format according to your requirement

User · Answer

Just using pure javascript  you can use the function below to get first day and last day of a week with freely setting day for start of week   var weekday       weekday 0     Sunday   weekday 1     Monday   weekday 2     Tuesday   weekday 3     Wednesday   weekday 4     Thursday   weekday 5     Friday   weekday 6     Saturday    function getFirstDayOfWeek date  from          Default start week from  Sunday   You can change it yourself      from   from     Sunday        var index   weekday indexOf from       var start   index  gt   0   index   0       var d   new Date date       var day   d getDay        var diff   d getDate   - day    start  gt  day   start - 7   start       d setDate diff       return d       Last day of week is just 6 days after first day of week  function getLastDayOfWeek date  from        from   from     Sunday       var index   weekday indexOf from       var start   index  gt   0   index   0       var d   new Date date       var day   d getDay        var diff   d getDate   - day    start  gt  day   start - 1   6   start       d setDate diff       return d       Test   getFirstDayOfWeek  2017-10-16      -- gt  Sun Oct 15 2017 getFirstDayOfWeek  2017-10-16    Monday      -- gt  Mon Oct 16 2017 getFirstDayOfWeek  2017-10-16    Tuesday      -- gt  Tue Oct 10 2017

User · Answer

var dt   new Date      current date of week var currentWeekDay   dt getDay    var lessDays   currentWeekDay    0   6   currentWeekDay-1 var wkStart   new Date new Date dt  setDate dt getDate  - lessDays    var wkEnd   new Date new Date wkStart  setDate wkStart getDate   6      This will be useful for any date scenario

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get start of week  QT     function  getStartOfWeek  date           var iDayOfWeek   date getDay            var iDifference   date getDate   - iDayOfWeek    iDayOfWeek     0    -6 1            return new Date date setDate iDifference                 function  getEndOfWeek date           return new Date date setDate date getDate      7 - date getDay        7   0    7 - date getDay                   current date    30 06 2016 and monday is the first day in week   It also works for different months and years  Tested with qunit suite             QUnit module  Planung  Start of week        QUnit test  Should return start of week based on current date   function  assert            var startOfWeek   Planung  getStartOfWeek new Date             assert ok  startOfWeek    returned date     startOfWeek                QUnit test  Should return start of week based on a sunday date   function  assert            var startOfWeek   Planung  getStartOfWeek new Date  2016-07-03             assert ok  startOfWeek    returned date     startOfWeek                QUnit test  Should return start of week based on a monday date   function  assert            var startOfWeek   Planung  getStartOfWeek new Date  2016-06-27             assert ok  startOfWeek    returned date     startOfWeek                QUnit module  Planung  End of week        QUnit test  Should return end of week based on current date   function  assert            var endOfWeek   Planung  getEndOfWeek new Date             assert ok  endOfWeek    returned date     endOfWeek               QUnit test  Should return end of week based on sunday date with different month   function  assert            var endOfWeek   Planung  getEndOfWeek new Date  2016-07-03             assert ok  endOfWeek    returned date     endOfWeek               QUnit test  Should return end of week based on monday date with different month   function  assert            var endOfWeek   Planung  getEndOfWeek new Date  2016-06-27             assert ok  endOfWeek    returned date     endOfWeek               QUnit test  Should return end of week based on 01-06-2016 with different month   function  assert            var endOfWeek   Planung  getEndOfWeek new Date  2016-06-01             assert ok  endOfWeek    returned date     endOfWeek               QUnit test  Should return end of week based on 21-06-2016 with different month   function  assert            var endOfWeek   Planung  getEndOfWeek new Date  2016-06-21             assert ok  endOfWeek    returned date     endOfWeek               QUnit test  Should return end of week based on 28-12-2016 with different month and year   function  assert            var endOfWeek   Planung  getEndOfWeek new Date  2016-12-28             assert ok  endOfWeek    returned date     endOfWeek               QUnit test  Should return end of week based on 01-01-2016 with different month and year   function  assert            var endOfWeek   Planung  getEndOfWeek new Date  2016-01-01             assert ok  endOfWeek    returned date     endOfWeek

User · Answer

An old question with lots of answers  so another one won t be an issue  Some general functions to get the start and end of all sorts of time units    For startOf and endOf week  the start day of the week defaults to Sunday  0  but any day can be passed  Monday - 1  Tuesday - 2  etc    Only uses Gregorian calendar though   The functions don t mutate the source date  so to see if a date is in the same week as some other date  week starting on Monday    if  d  gt   startOf  week   d1  1   amp  amp  d  lt   endOf  week   d1  1          d is in same week as d1     or in the current week starting on Sunday   if  d  gt   startOf  week    amp  amp  d  lt   endOf  week           d is in the current week      x000D   x000D     Returns a new Date object set to start of given unit x000D     For start of week  accepts any day as start x000D  function startOf unit  date   new Date    weekStartDay   0    x000D       Copy original so don t modify it x000D    let d   new Date date   x000D    let e   new Date d   x000D    e setHours 23 59 59 999   x000D       Define methods x000D    let start     x000D      second  d   gt  d setMilliseconds 0   x000D      minute  d   gt  d setSeconds 0 0   x000D      hour    d   gt  d setMinutes 0 0 0   x000D      day     d   gt  d setHours 0 0 0 0   x000D      week    d   gt    x000D        start day d   x000D        d setDate d getDate   - d getDay     weekStartDay   x000D        if  d  gt  e  d setDate d getDate   - 7   x000D         x000D      month   d   gt    x000D        start day d   x000D        d setDate 1   x000D         x000D      year    d   gt    x000D        start day d   x000D        d setMonth 0  1   x000D         x000D      decade  d   gt    x000D        start year d   x000D        let year   d getFullYear    x000D        d setFullYear year - year   10   x000D         x000D      century  d   gt    x000D        start year d   x000D        let year   d getFullYear    x000D        d setFullYear year - year   100   x000D         x000D      millenium  d   gt    x000D        start year d   x000D        let year   d getFullYear    x000D        d setFullYear year - year   1000   x000D        x000D      x000D    start unit  d   x000D    return d  x000D    x000D   x000D     Returns a new Date object set to end of given unit x000D     For end of week  accepts any day as start day x000D     Requires startOf x000D  function endOf unit  date   new Date    weekStartDay   0    x000D       Copy original so don t modify it x000D    let d   new Date date   x000D    let e   new Date date   x000D    e setHours 23 59 59 999   x000D       Define methods x000D    let end     x000D      second  d   gt  d setMilliseconds 999   x000D      minute  d   gt  d setSeconds 59 999   x000D      hour    d   gt  d setMinutes 59 59 999   x000D      day     d   gt  d setHours 23 59 59 999   x000D      week    w   gt    x000D        w   startOf  week   w  weekStartDay   x000D        w setDate w getDate     6   x000D        end day w   x000D        d   w  x000D         x000D      month   d   gt    x000D        d setMonth d getMonth     1  0   x000D        end day d   x000D           x000D      year    d   gt    x000D        d setMonth 11  31   x000D        end day d   x000D         x000D      decade  d   gt    x000D        end year d   x000D        let y   d getFullYear    x000D        d setFullYear y - y   10   9   x000D         x000D      century  d   gt    x000D        end year d   x000D        let y   d getFullYear    x000D        d setFullYear y - y   100   99   x000D         x000D      millenium  d   gt    x000D        end year d   x000D        let y   d getFullYear    x000D        d setFullYear y - y   1000   999   x000D        x000D      x000D    end unit  d   x000D    return d  x000D    x000D   x000D     Examples x000D  let d   new Date    x000D   x000D    second   minute   hour   day   week   month   year   x000D    decade   century   millenium   forEach unit   gt    x000D     console log   Start of     unit  padEnd 18            x000D     startOf unit  d  toString     x000D     console log   End of     unit  padEnd 18            x000D     endOf unit  d  toString     x000D      x000D   x000D   x000D

User · Answer

We have added jquery code that shows the current week of days from monday to sunday   var d   new Date    var week       var  days     Sun    Mon    Tue    Wed    Thu    Fri    Sat    var  months     Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec    for  let i   1  i  lt   7  i          let first   d getDate   - d getDay     i       let dt   new Date d setDate first        var  day    days dt getDay          var  month    months dt getMonth          var  date   dt getDate         if  date  lt  10              date    0    date              var  year   dt getFullYear         var fulldate    day      month      date      year           week push fulldate       console log week

User · Answer

var curr   new Date     get current date var first   curr getDate   - curr getDay       First day is the day of the month - the day of the week var last   first   6     last day is the first day   6  var firstday   new Date curr setDate first   toUTCString    var lastday   new Date curr setDate last   toUTCString     firstday  Sun  06 Mar 2011 12 25 40 GMT  lastday  Sat  12 Mar 2011 12 25 40 GMT    This works for firstday   sunday of this week and last day   saturday for this week  Extending it to run Monday to sunday is trivial   Making it work with first and last days in different months is left as an exercise for the user

User · Answer

This works across year and month changes   Date prototype GetFirstDayOfWeek   function         return  new Date this setDate this getDate   - this getDay          Date prototype GetLastDayOfWeek   function         return  new Date this setDate this getDate   - this getDay    6        var today   new Date     alert today GetFirstDayOfWeek      alert today GetLastDayOfWeek

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x000D   x000D  function getMonday d        d   new Date d       var day   d getDay            diff   d getDate   - day    day    0   -6 1      adjust when day is sunday     return new Date d setDate diff            console log  getMonday new Date new Date   getFullYear    new Date   getMonth    new Date   getDate           Mon Nov 08 2010 x000D   x000D   x000D

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JavaScript  function getWeekDays curr  firstDay   1    0 Sun  1 Mon              var cd   curr getDate   - curr getDay      var from   new Date curr setDate cd   firstDay      var to   new Date curr setDate cd   6   firstDay       return       from      to            TypeScript  export enum WEEK DAYS     Sunday   0    Monday   1    Tuesday   2    Wednesday   3    Thursday   4    Friday   5    Saturday   6     export const getWeekDays       curr  Date    firstDay  WEEK DAYS   WEEK DAYS Monday      from  Date  to  Date     gt      const cd   curr getDate   - curr getDay      const from   new Date curr setDate cd   firstDay      const to   new Date curr setDate cd   6   firstDay       return       from      to

User · Answer

Be careful with the accepted answer  it does not set the time to 00 00 00 and 23 59 59  so you can have problems  You can use a third party date library to deal with dates  For example  var startOfWeek   moment   startOf  week   toDate    var endOfWeek     moment   endOf  week   toDate      EDIT  As of September 2020  using Moment is discouraged for new projects  blog post   Another popular alternative is date-fns

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The moment approach worked for me for all the cases   although i have not test the boundaries like year end   leap years    Only Correction in the above code is the parameter is  isoWeek    if you want to start the week from Monday       let startOfWeek   moment   startOf  isoWeek   toDate        let endOfWeek   moment   endOf  isoWeek   toDate

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SetDate will sets the day of the month  Using setDate during start and end of the month will result in  wrong week  var curr   new Date  08-Jul-2014       get current date var first   curr getDate   - curr getDay       First day is the day of the month - the day of the week var last   first   6     last day is the first day   6 var firstday   new Date curr setDate first       06-Jul-2014 var lastday   new Date curr setDate last      12-Jul-2014   If u setting Date is 01-Jul-2014  it will show firstday as 29-Jun-2014 and lastday as 05-Jun-2014 instead of 05-Jul-2014  So overcome this issue i used  var curr   new Date    day   curr getDay    firstday   new Date curr getTime   - 60 60 24  day 1000     will return firstday  ie sunday  of the week lastday   new Date curr getTime     60   60  24   6   1000     adding  60 60 6 24 1000  means adding six days to the firstday which results in lastday  saturday  of the week

User · Answer

Here s a quick way to get first and last day  for any start day   knowing that     1 day   86 400 000 milliseconds     JS dates values are in milliseconds      Recipe  figure out how many days you need to remove to get the your week s start day  multiply by 1 day s worth of milliseconds   All that is left after that is to add 6 days to get your end day    var startDay   1    0 sunday  1 monday etc  var d   now getDay      get the current day var weekStart   new Date now valueOf   -  d lt  0   7-startDay d-startDay  86400000     rewind to start day var weekEnd   new Date weekStart valueOf     6 86400000     add 6 days to get last day

[javascript] How to get first and last day of the current week in JavaScript

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