How can I convert string to datetime with format specification in JavaScript

Question

How can I convert a string to a date time object in javascript by specifying a format string   I am looking for something like   var dateTime   convertToDateTime  23 11 2009 12 34 56    dd MM yyyy HH mm ss

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var temp1       var temp2        var str1   fd   var str2   td   var dt1    str1 substring 0 2   var dt2    str2 substring 0 2    var mon1   str1 substring 3 5   var mon2   str2 substring 3 5    var yr1    str1 substring 6 10     var yr2    str2 substring 6 10     temp1   mon1         dt1         yr1  temp2   mon2         dt2         yr2   var cfd   Date parse temp1   var ctd   Date parse temp2    var date1   new Date cfd    var date2   new Date ctd    if date1  gt  date2         alert  FROM DATE SHOULD BE MORE THAN TO DATE

User · Answer

No sophisticated date time formatting routines exist in JavaScript   You will have to use an external library for formatted date output   JavaScript Date Format  from Flagrant Badassery looks very promising   For the input conversion  several suggestions have been made already

User · Answer

External library is an overkill for parsing one or two dates  so I made my own function using Oli s and Christoph s solutions  Here in central Europe we rarely use aything but the OP s format  so this should be enough for simple apps used here   function ParseDate dateString          dd mm yyyy  or dd mm yy     var dateArr   dateString split           if  dateArr length    1            return null       wrong format             parse time after the year - separated by space     var spacePos   dateArr 2  indexOf           if spacePos  gt  1            var timeString   dateArr 2  substr spacePos   1           var timeArr   timeString split               dateArr 2    dateArr 2  substr 0  spacePos           if  timeArr length    2                  minutes only             return new Date parseInt dateArr 2    parseInt dateArr 1 -1   parseInt dateArr 0    parseInt timeArr 0    parseInt timeArr 1               else                 including seconds             return new Date parseInt dateArr 2    parseInt dateArr 1 -1   parseInt dateArr 0    parseInt timeArr 0    parseInt timeArr 1    parseInt timeArr 2                    else             gotcha at months - January is at 0  not 1 as one would expect         return new Date parseInt dateArr 2    parseInt dateArr 1  - 1   parseInt dateArr 0

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Date parse   is fairly intelligent but I can t guarantee that format will parse correctly   If it doesn t  you d have to find something to bridge the two  Your example is pretty simple  being purely numbers  so a touch of REGEX  or even string split   -- might be faster  paired with some parseInt   will allow you to quickly make a date

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time    2017-01-18T17 02 09 000 05 30   t   new Date time   hr     0    t getHours    slice -2   min     0    t getMinutes    slice -2   sec     0    t getSeconds    slice -2    t getFullYear    -  t getMonth   1  -  t getDate       hr     min     sec

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External library is an overkill for parsing one or two dates  so I made my own function using Oli s and Christoph s solutions  Here in central Europe we rarely use aything but the OP s format  so this should be enough for simple apps used here   function ParseDate dateString          dd mm yyyy  or dd mm yy     var dateArr   dateString split           if  dateArr length    1            return null       wrong format             parse time after the year - separated by space     var spacePos   dateArr 2  indexOf           if spacePos  gt  1            var timeString   dateArr 2  substr spacePos   1           var timeArr   timeString split               dateArr 2    dateArr 2  substr 0  spacePos           if  timeArr length    2                  minutes only             return new Date parseInt dateArr 2    parseInt dateArr 1 -1   parseInt dateArr 0    parseInt timeArr 0    parseInt timeArr 1               else                 including seconds             return new Date parseInt dateArr 2    parseInt dateArr 1 -1   parseInt dateArr 0    parseInt timeArr 0    parseInt timeArr 1    parseInt timeArr 2                    else             gotcha at months - January is at 0  not 1 as one would expect         return new Date parseInt dateArr 2    parseInt dateArr 1  - 1   parseInt dateArr 0

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time    2017-01-18T17 02 09 000 05 30   t   new Date time   hr     0    t getHours    slice -2   min     0    t getMinutes    slice -2   sec     0    t getSeconds    slice -2    t getFullYear    -  t getMonth   1  -  t getDate       hr     min     sec

User · Answer

Use new Date dateString  if your string is compatible with Date parse    If your format is incompatible  I think it is   you have to parse the string yourself  should be easy with regular expressions  and create a new Date object with explicit values for year  month  date  hour  minute and second

User · Answer

You can use the moment js library for this  I am using only to get time-specific output but you can select what kind of format you want to select   Reference   1  moment library  https   momentjs com   2  time and date specific functions  https   timestamp online article how-to-convert-timestamp-to-datetime-in-javascript  convertDate date            var momentDate   moment date  format  hh   mm A            return momentDate      and you can call this method like   this convertDate  2020-05-01T10 31 18 837Z      I hope it helps  Enjoy coding

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var temp1       var temp2        var str1   fd   var str2   td   var dt1    str1 substring 0 2   var dt2    str2 substring 0 2    var mon1   str1 substring 3 5   var mon2   str2 substring 3 5    var yr1    str1 substring 6 10     var yr2    str2 substring 6 10     temp1   mon1         dt1         yr1  temp2   mon2         dt2         yr2   var cfd   Date parse temp1   var ctd   Date parse temp2    var date1   new Date cfd    var date2   new Date ctd    if date1  gt  date2         alert  FROM DATE SHOULD BE MORE THAN TO DATE

User · Answer

Just for an updated answer here  there s a good js lib at http   www datejs com      Datejs is an open source JavaScript Date library for parsing  formatting and processing

User · Answer

You can use the moment js library for this  I am using only to get time-specific output but you can select what kind of format you want to select   Reference   1  moment library  https   momentjs com   2  time and date specific functions  https   timestamp online article how-to-convert-timestamp-to-datetime-in-javascript  convertDate date            var momentDate   moment date  format  hh   mm A            return momentDate      and you can call this method like   this convertDate  2020-05-01T10 31 18 837Z      I hope it helps  Enjoy coding

User · Answer

No sophisticated date time formatting routines exist in JavaScript   You will have to use an external library for formatted date output   JavaScript Date Format  from Flagrant Badassery looks very promising   For the input conversion  several suggestions have been made already

User · Answer

Just to give my 5 cents   My date format is dd mm yyyy  UK format  and none of the above examples were working for me  All the parsers  were considering mm as day and dd as month   I ve found this library  http   joey mazzarelli com 2008 11 25 easy-date-parsing-with-javascript  and it worked  because you can say the order of the fields like this    gt  gt console log new Date Date fromString  09 05 2012    order   DMY       Wed May 09 2012 00 00 00 GMT 0300  EEST    I hope that helps someone

User · Answer

Check out Moment js  It is a modern and powerful library that makes up for JavaScript s woeful Date functions  or lack thereof

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Christoph Mentions using a regex to tackle the problem  Here s what I m using   var dateString    2010-08-09 01 02 03   var reggie      d 4  -  d 2  -  d 2     d 2     d 2     d 2     var dateArray   reggie exec dateString    var dateObject   new Date        dateArray 1          dateArray 2  -1     Careful  month starts at 0        dateArray 3          dateArray 4          dateArray 5          dateArray 6        It s by no means intelligent  just configure the regex and new Date blah  to suit your needs   Edit  Maybe a bit more understandable in ES6 using destructuring   let dateString    2010-08-09 01 02 03      reggie      d 4  -  d 2  -  d 2     d 2     d 2     d 2           year  month  day  hours  minutes  seconds    reggie exec dateString      dateObject   new Date year  month-1  day  hours  minutes  seconds     But in all honesty these days I reach for something like Moment

User · Answer

No sophisticated date time formatting routines exist in JavaScript   You will have to use an external library for formatted date output   JavaScript Date Format  from Flagrant Badassery looks very promising   For the input conversion  several suggestions have been made already

User · Answer

Here pdate is the string date time var date1 GetDate pdate       function GetDate a           var dateString   a substr 6           var currentTime   new Date parseInt dateString             var month    0    currentTime getMonth     1   slice -2           var day    0   currentTime getDate    slice -2           var year   currentTime getFullYear            var date   day         month         year          return date

User · Answer

Use new Date dateString  if your string is compatible with Date parse    If your format is incompatible  I think it is   you have to parse the string yourself  should be easy with regular expressions  and create a new Date object with explicit values for year  month  date  hour  minute and second

User · Answer

Moment js will handle this   var momentDate   moment  23 11 2009 12 34 56    DD MM YYYY HH mm ss    var date   momentDate

User · Answer

I think this can help you  http   www mattkruse com javascript date   There s a getDateFromFormat   function that you can tweak a little to solve your problem   Update  there s an updated version of the samples available at javascripttoolbox com

User · Answer

Date parse   is fairly intelligent but I can t guarantee that format will parse correctly   If it doesn t  you d have to find something to bridge the two  Your example is pretty simple  being purely numbers  so a touch of REGEX  or even string split   -- might be faster  paired with some parseInt   will allow you to quickly make a date

User · Answer

Moment js will handle this   var momentDate   moment  23 11 2009 12 34 56    DD MM YYYY HH mm ss    var date   momentDate

User · Answer

Date parse   is fairly intelligent but I can t guarantee that format will parse correctly   If it doesn t  you d have to find something to bridge the two  Your example is pretty simple  being purely numbers  so a touch of REGEX  or even string split   -- might be faster  paired with some parseInt   will allow you to quickly make a date

User · Answer

Just to give my 5 cents   My date format is dd mm yyyy  UK format  and none of the above examples were working for me  All the parsers  were considering mm as day and dd as month   I ve found this library  http   joey mazzarelli com 2008 11 25 easy-date-parsing-with-javascript  and it worked  because you can say the order of the fields like this    gt  gt console log new Date Date fromString  09 05 2012    order   DMY       Wed May 09 2012 00 00 00 GMT 0300  EEST    I hope that helps someone

User · Answer

Use new Date dateString  if your string is compatible with Date parse    If your format is incompatible  I think it is   you have to parse the string yourself  should be easy with regular expressions  and create a new Date object with explicit values for year  month  date  hour  minute and second

User · Answer

To fully satisfy the Date parse convert string to format dd-mm-YYYY as specified in RFC822  if you use yyyy-mm-dd parse may do a mistakes

User · Answer

To fully satisfy the Date parse convert string to format dd-mm-YYYY as specified in RFC822  if you use yyyy-mm-dd parse may do a mistakes

User · Answer

Just for an updated answer here  there s a good js lib at http   www datejs com      Datejs is an open source JavaScript Date library for parsing  formatting and processing

User · Answer

Date parse   is fairly intelligent but I can t guarantee that format will parse correctly   If it doesn t  you d have to find something to bridge the two  Your example is pretty simple  being purely numbers  so a touch of REGEX  or even string split   -- might be faster  paired with some parseInt   will allow you to quickly make a date

User · Answer

I think this can help you  http   www mattkruse com javascript date   There s a getDateFromFormat   function that you can tweak a little to solve your problem   Update  there s an updated version of the samples available at javascripttoolbox com

User · Answer

Christoph Mentions using a regex to tackle the problem  Here s what I m using   var dateString    2010-08-09 01 02 03   var reggie      d 4  -  d 2  -  d 2     d 2     d 2     d 2     var dateArray   reggie exec dateString    var dateObject   new Date        dateArray 1          dateArray 2  -1     Careful  month starts at 0        dateArray 3          dateArray 4          dateArray 5          dateArray 6        It s by no means intelligent  just configure the regex and new Date blah  to suit your needs   Edit  Maybe a bit more understandable in ES6 using destructuring   let dateString    2010-08-09 01 02 03      reggie      d 4  -  d 2  -  d 2     d 2     d 2     d 2           year  month  day  hours  minutes  seconds    reggie exec dateString      dateObject   new Date year  month-1  day  hours  minutes  seconds     But in all honesty these days I reach for something like Moment

User · Answer

Use new Date dateString  if your string is compatible with Date parse    If your format is incompatible  I think it is   you have to parse the string yourself  should be easy with regular expressions  and create a new Date object with explicit values for year  month  date  hour  minute and second

User · Answer

Here pdate is the string date time var date1 GetDate pdate       function GetDate a           var dateString   a substr 6           var currentTime   new Date parseInt dateString             var month    0    currentTime getMonth     1   slice -2           var day    0   currentTime getDate    slice -2           var year   currentTime getFullYear            var date   day         month         year          return date

User · Answer

I think this can help you  http   www mattkruse com javascript date   There s a getDateFromFormat   function that you can tweak a little to solve your problem   Update  there s an updated version of the samples available at javascripttoolbox com

User · Answer

I think this can help you  http   www mattkruse com javascript date   There s a getDateFromFormat   function that you can tweak a little to solve your problem   Update  there s an updated version of the samples available at javascripttoolbox com

User · Answer

No sophisticated date time formatting routines exist in JavaScript   You will have to use an external library for formatted date output   JavaScript Date Format  from Flagrant Badassery looks very promising   For the input conversion  several suggestions have been made already

User · Answer

Check out Moment js  It is a modern and powerful library that makes up for JavaScript s woeful Date functions  or lack thereof

[javascript] How can I convert string to datetime with format specification in JavaScript?

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