how to parse a dd mm yyyy or dd-mm-yyyy or dd-mmm-yyyy formatted date string using JavaScript or jQuery

Question

Possible Duplicate    Extending JavaScript  39 s Date parse to allow for DD MM YYYY  non-US formatted dates     Convert dd-mm-yyyy string to date       Entered a date in textbox  for example  05 09 1985  and I wanted to convert it to 05-Sep-1985  dd-MMM-yyyy  format  How would I achieve this  Note that the source format may be dd-mm-yyyy or dd mm yyyy or dd-mmm-yyyy format   Code Snippet    function GetDateFormat controlName            if          controlName  val                              var d1   Date parse         controlName  val                 if  d1    null                    alert  Date Invalid                             controlName  val                                    var array   d1 toString  dd-MMM-yyyy                            controlName  val array                     This code returns 09-May-1985 but I want 05-Sep-1985  Thanks

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Update  Below you ve said      Sorry  i can t predict date format before  it should be like dd-mm-yyyy or dd mm yyyy or dd-mmm-yyyy format finally i wanted to convert all this format to dd-MMM-yyyy format     That completely changes the question  It ll be much more complex if you can t control the format  There is nothing built into JavaScript that will let you specify a date format  Officially  the only date format supported by JavaScript is a simplified version of ISO-8601  yyyy-mm-dd  although in practice almost all browsers also support yyyy mm dd as well  But other than that  you have to write the code yourself or  and this makes much more sense  use a good library  I d probably use a library like moment js or DateJS  although DateJS hasn t been maintained in years      Original answer   If the format is always dd mm yyyy  then this is trivial   var parts   str split       var dt   new Date parseInt parts 2   10                     parseInt parts 1   10  - 1                    parseInt parts 0   10      split splits a string on the given delimiter  Then we use parseInt to convert the strings into numbers  and we use the new Date constructor to build a Date from those parts  The third part will be the year  the second part the month  and the first part the day  Date uses zero-based month numbers  and so we have to subtract one from the month number

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Date parse recognizes only specific formats  and you don t have the option of telling it what your input format is  In this case it thinks that the input is in the format mm dd yyyy  so the result is wrong   To fix this  you need either to parse the input yourself  e g  with String split  and then manually construct a Date object  or use a more full-featured library such as datejs   Example for manual parsing   var input           controlName  val    var parts   str split       var d1   new Date Number parts 2    Number parts 1   - 1  Number parts 0       Example using date js   var input           controlName  val    var d1   Date parseExact input   d M yyyy

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See this http   blog stevenlevithan com archives date-time-format  you can do anything with date   file   http   stevenlevithan com assets misc date format js  add this to your html code using script tag and to use you can use it as     var now   new Date     now format  m dd yy       Returns  e g   6 09 07

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You might want to use helper library like http   momentjs com  which wraps the native javascript date object for easier manipulations  Then you can do things like   var day   moment  12-25-1995    MM-DD-YYYY      or  var day   moment  25 12 1995    DD MM YYYY      then operate on the date  day add  days   7    and to get the native javascript date  day toDate

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Try this    function GetDateFormat controlName            if          controlName  val                              var d1   Date parse         controlName  val   toString   replace    0-9       0-9       2  1                 if  d1    null                    alert  Date Invalid                             controlName  val                                    var array   d1 toString  dd-MMM-yyyy                            controlName  val array                     The RegExp replace  replace    0-9       0-9       2  1   change day month position

[javascript] how to parse a "dd/mm/yyyy" or "dd-mm-yyyy" or "dd-mmm-yyyy" formatted date string using JavaScript or jQuery

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