Format JavaScript date as yyyy-mm-dd

Question

I have a date with the format Sun May 11 2014  How can I convert it to 2014-05-11 using JavaScript    x000D   x000D  function taskDate dateMilli    x000D      var d    new Date dateMilli        split       x000D      d 2    d 2         x000D   x000D      return  d 0   d 1   d 2   d 3   join       x000D    x000D   x000D  var datemilli   Date parse  Sun May 11 2014    x000D  console log taskDate datemilli    x000D   x000D   x000D    The code above gives me the same date format  sun may 11 2014  How can I fix this

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Just leverage the built-in toISOString method that brings your date to the ISO 8601 format  yourDate toISOString   split  T   0   Where yourDate is your date object  Edit   exbuddha wrote this to handle time zone in the comments  const offset   yourDate getTimezoneOffset   yourDate   new Date yourDate getTime   -  offset 60 1000   return yourDate toISOString   split  T   0

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If you use momentjs  now they include a constant for that format YYYY-MM-DD   date format moment HTML5 FMT DATE

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If the date needs to be the same across all time zones  for example represents some value from the database  then be sure to use UTC versions of the day  month  fullyear functions on the JavaScript date object as this will display in UTC time and avoid off-by-one errors in certain time zones   Even better  use the Moment js date library for this sort of formatting

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Shortest  toJSON   slice 0 10     x000D   x000D  var d   new Date  Sun May 11 2014     UTC         Parse as UTC let str   d toJSON   slice 0 10                   Show as UTC  console log str   x000D   x000D   x000D

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You can do   x000D   x000D  function formatDate date        var d   new Date date           month         d getMonth     1           day        d getDate            year   d getFullYear         if  month length  lt  2           month    0    month      if  day length  lt  2           day    0    day       return  year  month  day  join  -        console log formatDate  Sun May 11 2014     x000D   x000D   x000D   Usage example  console log formatDate  Sun May 11 2014      Output  2014-05-11  Demo on JSFiddle  http   jsfiddle net abdulrauf6182012 2Frm3

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formatDate date      const d   new Date date    const ye   new Intl DateTimeFormat  en     year   numeric     format d     const mo   new Intl DateTimeFormat  en     month   short     format d     const da   new Intl DateTimeFormat  en     day   2-digit     format d     return    da -  mo -  ye       console log  quot Formatated Date    quot   formatDate  quot 09 25 2020 quot        Output    Formatated Date   25-Sep-2020

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When ES2018 rolls around  works in chrome  you can simply regex it  new Date         toISOString        replace               lt year gt  d  -   lt month gt  d  -   lt day gt  d  T                 lt year gt -  lt month gt -  lt day gt          2020-07-14 Or if you d like something pretty versatile with no libraries whatsoever  new Date         toISOString        match               lt yyyy gt  d d   lt yy gt  d d  -   lt mm gt 0    lt m gt  d   -   lt dd gt 0    lt d gt  d   T   lt HH gt 0    lt H gt  d       lt MM gt 0    lt M gt  d       lt SSS gt    lt SS gt 0    lt S gt  d      d     lt timezone gt  A-Z   dA-Z -                  groups  Which results in extracting the following       H   quot 8 quot      HH   quot 08 quot      M   quot 45 quot      MM   quot 45 quot      S   quot 42 quot      SS   quot 42 quot      SSS   quot 42 855 quot      d   quot 14 quot      dd   quot 14 quot      m   quot 7 quot      mm   quot 07 quot      timezone   quot Z quot      yy   quot 20 quot      yyyy   quot 2020 quot     Which you can use like so with replace         lt d gt    lt m gt      lt yy gt      lt H gt    lt MM gt    as at the top instead of  match      groups to get 14 7  20   8 45

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It is easily accomplished by my date-shortcode package   const dateShortcode   require  date-shortcode   dateShortcode parse   YYYY-MM-DD     Sun May 11 2014       gt   2014-05-11

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This worked for me to get the current date in the desired format  YYYYMMDD HH MM SS    var d   new Date     var date1   d getFullYear                        d getMonth   1   lt  10    0     d getMonth     1     d getMonth     1                                   d getDate    lt  10    0    d getDate     d getDate      var time1    d getHours    lt  10    0    d getHours     d getHours                                     d getMinutes    lt  10    0    d getMinutes     d getMinutes                                     d getSeconds    lt  10    0    d getSeconds     d getSeconds      print date1     time1

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Format and finding maximum and minimum date from hashmap data    x000D   x000D  var obj     a   2001-15-01    b    2001-12-02     c    2001-1-03    x000D   x000D  function findMaxMinDate obj   x000D    let formatEncode    id   gt    let s   id split  -    return    s 0   -  s 2   -  s 1     x000D    let formatDecode    id   gt    let s   id split       return    s 2   -  s 0   -  s 1     x000D    let arr   Object keys  obj   map   key    gt    return new Date formatEncode obj key         x000D    let min   new Date Math min apply null  arr   toLocaleDateString    x000D    let max   new Date Math max apply null  arr   toLocaleDateString    x000D    return  maxd     formatDecode max     mind    formatDecode min     x000D    x000D   x000D  console log findMaxMinDate obj    x000D   x000D   x000D

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You can try this  https   www npmjs com package timesolver  npm i timesolver   Use it in your code   const timeSolver   require  timeSolver    const date   new Date    const dateString   timeSolver getString date   YYYY-MM-DD      You can get the date string by using this method   getString

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A combination of some of the answers   var d   new Date date   date       d getFullYear        0     d getMonth     1   slice -2       0    d getDate    slice -2    join  -

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toISOString   assumes your date is local time and converts it to UTC  You will get an incorrect date string   The following method should return what you need   Date prototype yyyymmdd   function                   var yyyy   this getFullYear   toString                                            var mm    this getMonth   1  toString       getMonth   is zero-based              var dd    this getDate   toString                      return yyyy    -     mm 1  mm  0  mm 0      -     dd 1  dd  0  dd 0         Source  https   blog justin kelly org au simple-javascript-function-to-format-the-date-as-yyyy-mm-dd

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Simply use this   var date   new Date  1970-01-01       Or your date here console log  date getMonth     1          date getDate            date getFullYear       Simple and sweet

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Here is one way to do it   var date   Date parse  Sun May 11 2014     function format date      date   new Date date      var day     0    date getDate    slice -2     var month     0     date getMonth     1   slice -2     var year   date getFullYear       return year    -    month    -    day     console log format date

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PHP compatible date format  Here is a small function which can take the same parameters as the PHP function date   and return a date time string in JavaScript   Note that not all date   format options from PHP are supported  You can extend the parts object to create the missing format-token   x000D   x000D      x000D     Date formatter with PHP  date   -compatible format syntax  x000D      x000D  const formatDate    format  date    gt    x000D    if   format    format    Y-m-d    x000D    if   date    date   new Date     x000D   x000D    const parts     x000D      Y  date getFullYear   toString    x000D      y    00     date getYear   - 100   toString   slice -2   x000D      m    0     date getMonth     1   toString   slice -2   x000D      n   date getMonth     1  toString    x000D      d    0    date getDate    toString   slice -2   x000D      j  date getDate   toString    x000D      H    0    date getHours    toString   slice -2   x000D      G  date getHours   toString    x000D      i    0    date getMinutes    toString   slice -2   x000D      s    0    date getSeconds    toString   slice -2  x000D      x000D   x000D    const modifiers   Object keys parts  join     x000D    const reDate   new RegExp     lt            modifiers         g   x000D    const reEscape   new RegExp            modifiers          g   x000D   x000D    return format x000D       replace reDate   0   gt  parts  0   x000D       replace reEscape    0   1    gt   1  x000D    x000D   x000D     ----- EXAMPLES ----- x000D  console log  formatDate          2019-05-21  x000D  console log  formatDate  H i s          16 21 32  x000D  console log  formatDate  Y-m-d  o  n H i s          2019-05-21  on 16 21 32  x000D  console log  formatDate  Y-m-d   new Date 2000000000000          2033-05-18  x000D   x000D   x000D    Gist  Here is a gist with an updated version of the formatDate   function and additional examples  https   gist github com stracker-phil c7b68ea0b1d5bbb97af0a6a3dc66e0d9

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We run constantly into problems like this  Every solution looks so individual  But looking at php  we have a way dealing with different formats  And there is a port of php s strtotime function at https   locutus io php datetime strtotime   A small open source npm package from me as an alternative way   lt script type  quot module quot  gt  import   datebob   from  quot  dipser datebob js quot   console log  datebob  Sun May 11  2014   format  Y-m-d        lt  script gt   See datebob js

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This code change the order of DD MM YYYY  function convertDate format  date        let formatArray   format split           if  formatArray length    3            console error  Use a valid Date format            return            function getType type    return type     DD    d getDate     type     MM    d getMonth     1   type     YYYY   amp  amp  d getFullYear          function pad s    return  s  lt  10     0    s   s        var d   new Date date       return  pad getType formatArray 0     pad getType formatArray 1     getType formatArray 2    join

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x000D   x000D  const today   new Date       or whatever  x000D   x000D  const yearFirstFormater    date   string   gt    x000D      const modifiedDate   new Date date  toISOString   slice 0  10   x000D      return    modifiedDate split  -   0     modifiedDate split  -   1     modifiedDate split  -   2     x000D    x000D   x000D  const monthFirstFormater    date   string   gt    x000D      const modifiedDate   new Date date  toISOString   slice 0  10   x000D      return    modifiedDate split  -   1     modifiedDate split  -   2     modifiedDate split  -   0     x000D    x000D   x000D  const dayFirstFormater    date   string   gt    x000D      const modifiedDate   new Date date  toISOString   slice 0  10   x000D      return    modifiedDate split  -   2     modifiedDate split  -   1     modifiedDate split  -   0     x000D    x000D   x000D  console log yearFirstFormater today    x000D  console log monthFirstFormater today    x000D  console log dayFirstFormater today    x000D   x000D   x000D

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This worked for me  and you can paste this directly into your HTML if needed for testing    lt script type  text javascript  gt      if  datefield type   date       If the browser doesn t support input type  date                                       initialize date picker widget          jQuery function        On document ready                 Date   datepicker                   dateFormat   yy-mm-dd      THIS IS THE IMPORTANT PART                    showOtherMonths  true                  selectOtherMonths  true                  changeMonth  true                  minDate   2016-10-19                   maxDate   2016-11-03                                    lt  script gt

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Date js is great for this   require  datejs    new Date    toString  yyyy-MM-dd

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x000D   x000D  function myYmd D   x000D      var pad   function num    x000D          var s    0    num  x000D          return s substr s length - 2   x000D        x000D      var Result   D getFullYear      -    pad  D getMonth     1      -    pad D getDate     x000D      return Result  x000D    x000D   x000D  var datemilli   new Date  Sun May 11 2014    x000D  document write myYmd datemilli    x000D   x000D   x000D

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new Date   toLocaleDateString  pt-br   split        reverse    join   -       or   new Date   toISOString   split  T   0  new Date  23 03 2020  split      reverse   join  -    toISOString   new Date  23 03 2020  split      reverse   join  -    toISOString   split  T   0    Try this

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Yet another combination of the answers  Nicely readable  but a little lengthy   function getCurrentDayTimestamp       const d   new Date       return new Date      Date UTC        d getFullYear          d getMonth          d getDate          d getHours          d getMinutes          d getSeconds               toIsoString  returns something like  2017-08-22T08 32 32 847Z       and we want the first part   2017-08-22       toISOString   slice 0  10

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A few of the previous answer were OK  but they weren t very flexible  I wanted something that could really handle more edge cases  so I took  orangleliu  s answer and expanded on it  https   jsfiddle net 8904cmLd 1   function DateToString inDate  formatString           Written by m1m1k 2018-04-05         Validate that we re working with a date     if  isValidDate inDate                 inDate   new Date inDate                 See the jsFiddle for extra code to be able to use DateToString  Sun May 11 2014    USA          formatString   CountryCodeToDateFormat formatString        var dateObject             M  inDate getMonth     1          d  inDate getDate            D  inDate getDate            h  inDate getHours            m  inDate getMinutes            s  inDate getSeconds            y  inDate getFullYear            Y  inDate getFullYear                  Build Regex Dynamically based on the list above         It should end up with something like this      Yy   M   Dd   h  m  s   g      var dateMatchRegex   joinObj dateObject                   var regEx   new RegExp dateMatchRegex  g        formatString   formatString replace regEx  function formatToken            var datePartValue   dateObject formatToken slice -1            var tokenLength   formatToken length              A conflict exists between specifying  d  for no zero pad - gt  expand            to  10  and specifying yy for just two year digits  01  instead            of  2001    One expands  the other contracts                        So Constrict Years but Expand All Else         if  formatToken indexOf  y    lt  0  amp  amp  formatToken indexOf  Y    lt  0                           Expand single digit format token  d  to                multi digit value  10  when needed             var tokenLength   Math max formatToken length  datePartValue toString   length                     var zeroPad    datePartValue toString   length  lt  formatToken length    0  repeat tokenLength                 return  zeroPad   datePartValue  slice -tokenLength                return formatString      Example usage   DateToString  Sun May 11 2014    MM DD yy    DateToString  Sun May 11 2014    yyyy MM dd    DateToString new Date  Sun Dec 11 2014    yy-M-d

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No library is needed  Just pure JavaScript   The example below gets the last two months from today    x000D   x000D  var d   new Date   x000D  d setMonth d getMonth   - 2   x000D  var dateString   new Date d   x000D  console log  Before Format   dateString   After format   dateString toISOString   slice 0 10   x000D   x000D   x000D

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To consider the timezone also  this one-liner should be good without any library   new Date   toLocaleString  en-IN    timeZone   Asia Kolkata    split      0

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Reformatting a date string is fairly straightforward  e g    x000D   x000D  var s    Sun May 11 2014   x000D   x000D  function reformatDate s    x000D    function z n  return   0    n  slice -2   x000D    var months      jan   feb   mar   apr   may   jun   x000D                    jul   aug   sep   oct   nov   dec    x000D    var b   s split   W     x000D    return b 3     -    x000D      z months indexOf b 1  substr 0 3  toLowerCase        -    x000D      z b 2    x000D    x000D   x000D  console log reformatDate s    x000D   x000D   x000D

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format   function date2str x  y        var z             M  x getMonth     1          d  x getDate            h  x getHours            m  x getMinutes            s  x getSeconds              y   y replace   M  d  h  m  s   g  function v            return   v length  gt  1    quot 0 quot     quot  quot     z v slice -1    slice -2               return y replace   y   g  function v            return x getFullYear   toString   slice -v length             Result  format new Date  Sun May 11 2014     yyyy-MM-dd    quot 2014-05-11

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x000D   x000D  var d   new Date  Sun May 1 2014    x000D   x000D  var year    d getFullYear    x000D  var month   d getMonth     1  x000D  var day     d getDate     x000D   x000D  month   checkZero month                x000D  day     checkZero day   x000D   x000D  var date       x000D   x000D  date    year  x000D  date     -   x000D  date    month  x000D  date     -   x000D  date    day  x000D   x000D  document querySelector   display   innerHTML   date  x000D       x000D  function checkZero i   x000D    x000D      if  i  lt  10   x000D        x000D          i    0    i x000D             add zero in front of numbers  lt  10 x000D   x000D      return i  x000D    x000D   lt div id  display  gt  lt  div gt  x000D   x000D   x000D

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new Date new Date YOUR DATE toISOString    getTime   -                    YOUR DATE getTimezoneOffset     60   1000   toISOString   substr 0  10

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You can use toLocaleDateString  fr-CA   on Date object   x000D   x000D  console log new Date  Sun May 11 2014   toLocaleDateString  fr-CA     x000D   x000D   x000D    Also I found out that those locales give right result from this locales list List of All Locales and Their Short Codes    en-CA   fr-CA   lt-LT   sv-FI   sv-SE     x000D   x000D  var localesList     af-ZA   x000D     am-ET   x000D     ar-AE   x000D     ar-BH   x000D     ar-DZ   x000D     ar-EG   x000D     ar-IQ   x000D     ar-JO   x000D     ar-KW   x000D     ar-LB   x000D     ar-LY   x000D     ar-MA   x000D     arn-CL   x000D     ar-OM   x000D     ar-QA   x000D     ar-SA   x000D     ar-SY   x000D     ar-TN   x000D     ar-YE   x000D     as-IN   x000D     az-Cyrl-AZ   x000D     az-Latn-AZ   x000D     ba-RU   x000D     be-BY   x000D     bg-BG   x000D     bn-BD   x000D     bn-IN   x000D     bo-CN   x000D     br-FR   x000D     bs-Cyrl-BA   x000D     bs-Latn-BA   x000D     ca-ES   x000D     co-FR   x000D     cs-CZ   x000D     cy-GB   x000D     da-DK   x000D     de-AT   x000D     de-CH   x000D     de-DE   x000D     de-LI   x000D     de-LU   x000D     dsb-DE   x000D     dv-MV   x000D     el-GR   x000D     en-029   x000D     en-AU   x000D     en-BZ   x000D     en-CA   x000D     en-GB   x000D     en-IE   x000D     en-IN   x000D     en-JM   x000D     en-MY   x000D     en-NZ   x000D     en-PH   x000D     en-SG   x000D     en-TT   x000D     en-US   x000D     en-ZA   x000D     en-ZW   x000D     es-AR   x000D     es-BO   x000D     es-CL   x000D     es-CO   x000D     es-CR   x000D     es-DO   x000D     es-EC   x000D     es-ES   x000D     es-GT   x000D     es-HN   x000D     es-MX   x000D     es-NI   x000D     es-PA   x000D     es-PE   x000D     es-PR   x000D     es-PY   x000D     es-SV   x000D     es-US   x000D     es-UY   x000D     es-VE   x000D     et-EE   x000D     eu-ES   x000D     fa-IR   x000D     fi-FI   x000D     fil-PH   x000D     fo-FO   x000D     fr-BE   x000D     fr-CA   x000D     fr-CH   x000D     fr-FR   x000D     fr-LU   x000D     fr-MC   x000D     fy-NL   x000D     ga-IE   x000D     gd-GB   x000D     gl-ES   x000D     gsw-FR   x000D     gu-IN   x000D     ha-Latn-NG   x000D     he-IL   x000D     hi-IN   x000D     hr-BA   x000D     hr-HR   x000D     hsb-DE   x000D     hu-HU   x000D     hy-AM   x000D     id-ID   x000D     ig-NG   x000D     ii-CN   x000D     is-IS   x000D     it-CH   x000D     it-IT   x000D     iu-Cans-CA   x000D     iu-Latn-CA   x000D     ja-JP   x000D     ka-GE   x000D     kk-KZ   x000D     kl-GL   x000D     km-KH   x000D     kn-IN   x000D     kok-IN   x000D     ko-KR   x000D     ky-KG   x000D     lb-LU   x000D     lo-LA   x000D     lt-LT   x000D     lv-LV   x000D     mi-NZ   x000D     mk-MK   x000D     ml-IN   x000D     mn-MN   x000D     mn-Mong-CN   x000D     moh-CA   x000D     mr-IN   x000D     ms-BN   x000D     ms-MY   x000D     mt-MT   x000D     nb-NO   x000D     ne-NP   x000D     nl-BE   x000D     nl-NL   x000D     nn-NO   x000D     nso-ZA   x000D     oc-FR   x000D     or-IN   x000D     pa-IN   x000D     pl-PL   x000D     prs-AF   x000D     ps-AF   x000D     pt-BR   x000D     pt-PT   x000D     qut-GT   x000D     quz-BO   x000D     quz-EC   x000D     quz-PE   x000D     rm-CH   x000D     ro-RO   x000D     ru-RU   x000D     rw-RW   x000D     sah-RU   x000D     sa-IN   x000D     se-FI   x000D     se-NO   x000D     se-SE   x000D     si-LK   x000D     sk-SK   x000D     sl-SI   x000D     sma-NO   x000D     sma-SE   x000D     smj-NO   x000D     smj-SE   x000D     smn-FI   x000D     sms-FI   x000D     sq-AL   x000D     sr-Cyrl-BA   x000D     sr-Cyrl-CS   x000D     sr-Cyrl-ME   x000D     sr-Cyrl-RS   x000D     sr-Latn-BA   x000D     sr-Latn-CS   x000D     sr-Latn-ME   x000D     sr-Latn-RS   x000D     sv-FI   x000D     sv-SE   x000D     sw-KE   x000D     syr-SY   x000D     ta-IN   x000D     te-IN   x000D     tg-Cyrl-TJ   x000D     th-TH   x000D     tk-TM   x000D     tn-ZA   x000D     tr-TR   x000D     tt-RU   x000D     tzm-Latn-DZ   x000D     ug-CN   x000D     uk-UA   x000D     ur-PK   x000D     uz-Cyrl-UZ   x000D     uz-Latn-UZ   x000D     vi-VN   x000D     wo-SN   x000D     xh-ZA   x000D     yo-NG   x000D     zh-CN   x000D     zh-HK   x000D     zh-MO   x000D     zh-SG   x000D     zh-TW   x000D     zu-ZA  x000D     x000D   x000D  localesList forEach lcl   gt    x000D    if   2014-05-11      new Date  Sun May 11 2014   toLocaleDateString lcl     x000D      console log lcl  new Date  Sun May 11 2014   toLocaleDateString lcl    x000D      x000D      x000D   x000D   x000D

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None of these answers quite satisfied me  I wanted a cross-platform solution that gave me the day in the local timezone without using any external libraries   This is what I came up with   function localDay time      var minutesOffset   time getTimezoneOffset     var millisecondsOffset   minutesOffset 60 1000   var local   new Date time - millisecondsOffset    return local toISOString   substr 0  10      That should return the day of the date  in YYYY-MM-DD format  in the timezone the date references   So for example  localDay new Date  2017-08-24T03 29 22 099Z    will return  2017-08-23  even though it s already the 24th at UTC   You ll need to polyfill Date prototype toISOString for it to work in Internet nbsp Explorer nbsp 8  but it should be supported everywhere else

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All given answers are great and helped me big  In my situation  I wanted to get the current date in yyyy mm dd format along with date-1  Here is what worked for me   var endDate   new Date   toISOString   slice 0  10      To get the Current Date in YYYY MM DD Format  var newstartDate   new Date    newstartDate setDate newstartDate getDate   - 1   var startDate   newstartDate toISOString   slice 0  10      To get the Yesterday s Date in YYYY MM DD Format alert startDate

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Retrieve year  month  and day  and then put them together  Straight  simple  and accurate    x000D   x000D  function formatDate date    x000D      var year   date getFullYear   toString    x000D      var month    date getMonth     101  toString   substring 1   x000D      var day    date getDate     100  toString   substring 1   x000D      return year    -    month    -    day  x000D    x000D   x000D    Usage example  x000D  alert formatDate new Date      x000D   x000D   x000D

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2020 ANSWER You can use the native  toLocaleDateString   function which supports several useful params like locale  to select a format like MM DD YYYY or YYYY MM DD   timezone  to convert the date  and formats details options  eg  1 vs 01 vs January   Examples new Date   toLocaleDateString      8 19 2020  new Date   toLocaleDateString  en-US    year   numeric   month   2-digit   day   2-digit        08 19 2020  month and day with two digits   new Date   toLocaleDateString  en-ZA       2020 08 19  year month day  notice the different locale  new Date   toLocaleDateString  en-CA       2020-08-19  year-month-day  notice the different locale  new Date   toLocaleString  quot en-US quot    timeZone   quot America New York quot        8 19 2020  9 29 51 AM   date and time in a specific timezone   new Date   toLocaleString  quot en-US quot    hour   2-digit   hour12  false  timeZone   quot America New York quot         09  just the hour   Notice that sometimes to output a date in your specific desire format  you have to find a compatible locale with that format  You can find the locale examples here  https   www w3schools com jsref tryit asp filename tryjsref tolocalestring date all Please notice that locale just change the format  if you want to transform a specific date to a specific country or city time equivalent then you need to use the timezone param

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I modified Samit Satpute s response as follows    x000D   x000D  var newstartDate   new Date    x000D     newstartDate setDate newstartDate getDate   - 1   x000D  var startDate   newstartDate toISOString   replace   -T   Z  g          slice 0  10      To get the Yesterday s Date in YYYY MM DD Format x000D  console log startDate   x000D   x000D   x000D

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I suggest using something like formatDate-js instead of trying to  replicate it every time  Just use a library that supports all the major strftime actions   new Date   format   Y- m- d

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If you don t have anything against using libraries  you could just use the Moments js library like so    x000D   x000D  var now   new Date    x000D  var dateString   moment now  format  YYYY-MM-DD    x000D   x000D  var dateStringWithTime   moment now  format  YYYY-MM-DD HH mm ss    x000D   lt script src  https   cdnjs cloudflare com ajax libs moment js 2 18 1 moment min js  gt  lt  script gt  x000D   x000D   x000D

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const formatDate   d   gt        d getFullYear         d getMonth     1  toString   padStart 2   0        d getDate   toString   padStart 2   0     join  -     You can make use of padstart  padStart n   0   ensures that a minimum of n characters are in a string and prepends it with  0 s until that length is reached  join  -   concatenates an array  adding  -  symbol between every elements  getMonth   starts at 0 hence the  1

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I use this way to get the date in format  yyyy-mm-dd     var todayDate   new Date   toISOString   slice 0 10

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The simplest way to convert your date to the yyyy-mm-dd format  is to do this   var date   new Date  Sun May 11 2014    var dateString   new Date date getTime   -  date getTimezoneOffset     60000                         toISOString                        split  T   0     How it works    new Date  Sun May 11 2014   converts the string  Sun May 11 2014  to a date object that represents the time Sun May 11 2014 00 00 00 in a timezone based on current locale  host system settings  new Date date getTime   -  date getTimezoneOffset     60000    converts your date to a date object that corresponds with the time Sun May 11 2014 00 00 00 in UTC  standard time  by subtracting the time zone offset  toISOString   converts the date object to an ISO 8601 string 2014-05-11T00 00 00 000Z  split  T   splits the string to array   2014-05-11    00 00 00 000Z    0  takes the first element of that array     Demo   x000D   x000D  var date   new Date  Sun May 11 2014    x000D  var dateString   new Date date getTime   -  date getTimezoneOffset     60000    x000D                       toISOString   x000D                       split  T   0   x000D   x000D  console log dateString   x000D   x000D   x000D

[javascript] Format JavaScript date as yyyy-mm-dd

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