Convert date to UTC using moment js

Question

Probably and easy answer to this but I can t seem to find a way to get moment js to return a UTC date time in milliseconds  Here is what I am doing   var date       txt-date   val        expires   moment utc date     Any idea what I am doing wrong

User · Answer

I use this method and it works  ValueOf does not work for me   moment utc yourDate  format

User · Answer

This worked for me  Others might find it useful     date   2020-08-31T00 00 00Z     I m located in Denmark  timezone is  2 hours  moment utc moment date  utc    format      returns 2020-08-30T22 00 00Z

User · Answer

This will be the answer   moment utc moment localdate   format     localdate    2020-01-01 12 00 00   moment localdate    Moment lt 2020-01-01T12 00 00 08 00 gt   moment utc moment localdate   format     2020-01-01T04 00 00Z

User · Answer

If all else fails  just reinitialize with an inverse of your local offset   var timestamp   new Date    var inverseOffset   moment timestamp  utcOffset     -1  timestamp   moment   utcOffset  inverseOffset      timestamp toISOString       This should give you the accurate UTC equivalent

User · Answer

This is found in the documentation   With a library like moment  I urge you to read the entirety of the documentation   It s really important   Assuming the input text is entered in terms of the users s local time    var expires   moment date  valueOf      If the user is instructed actually enter a UTC date time  then    var expires   moment utc date  valueOf

User · Answer

moment utc date  format          is the way to go  since  moment   utc date  format         does behave weird

User · Answer

Read this documentation of moment js here   See below example and output where I convert GMT time to local time  my zone is IST  and then I convert local time to GMT       convert GMT to local time console log  Server time     data i  locationServerTime  let serv utc   moment utc data i  locationServerTime   YYYY-MM-DD HH mm ss   toDate    console log  serv utc     serv utc  data i  locationServerTime   moment serv utc  YYYY-MM-DD HH mm ss   tz self zone name  format  YYYY-MM-DD HH mm ss    console log  Converted to local time     data i  locationServerTime      convert local time to GMT console log  local time     data i  locationServerTime  let serv utc   moment data i  locationServerTime   YYYY-MM-DD HH mm ss   toDate    console log  serv utc     serv utc  data i  locationServerTime   moment utc serv utc  YYYY-MM-DD HH mm ss   format  YYYY-MM-DD HH mm ss    console log  Converted to server time     data i  locationServerTime    Output is  Server time 2019-12-19 09 28 13 serv utc Thu Dec 19 2019 14 58 13 GMT 0530  India Standard Time  Converted to local time 2019-12-19 14 58 13 local time 2019-12-19 14 58 13 serv utc Thu Dec 19 2019 14 58 13 GMT 0530  India Standard Time  Converted to server time 2019-12-19 09 28 13

User · Answer

here  I m passing the date object and converting it into UTC time     fn convertTimeToUTC   function  convertTime       if   this  isObject convertTime             return moment tz convertTime format  Y-MM-DD HH mm ss    moment tz guess    utc   format  Y-MM-DD HH mm ss                Returns if a value is an object   fn isObject    function value        return value  amp  amp  typeof value      object          you can call it as below   this  convertTimeToUTC date

User · Answer

Don t you need something to compare and then retrieve the milliseconds   For instance   let enteredDate       txt-date   val       get the date entered in the input let expires   moment utc enteredDate      convert it into UTC   With that you have the expiring date in UTC  Now you can get the  right-now  date in UTC and compare   var rightNowUTC   moment utc       get this moment in UTC based on browser let duration   moment duration rightNowUTC diff expires       get the diff let remainingTimeInMls   duration asMilliseconds

User · Answer

As of   moment js version 2 24 0  let s say you have a local date input  this is the proper way to convert your dateTime or Time input to UTC      var utcStart   new moment  09 00    HH mm   utc      or in case you specify a date   var utcStart   new moment  2019-06-24T09 00    YYYY-MM-DDTHH mm   utc      As you can see the result output will be returned in UTC      You can call the format   that will return your UTC date in a string   utcStart format       Result   2019-06-24T13 00 00    But if you do this as below  it will not convert to UTC     var myTime   new moment utc  09 00    HH mm       You re only setting your input to utc time  it s as if your mentioning that myTime is in UTC      the output will be 9 00

User · Answer

This moment utc stringDate  format  toDate   worked for me  This moment utc date  toDate   not

[javascript] Convert date to UTC using moment.js

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