How to determine one year from now in Javascript

Question

I m trying to get one year from now s date  and it s not working   JS   var now   new Date     var oneYr   new Date    oneYr setYear now getYear     1       yearFromNow   append oneYr toString      var oneMonth   new Date    oneMonth setMonth now getMonth     1       monthFromNow   append oneMonth toString       Output   one mo    Thu Dec 22 112 15 16 01 GMT-0500  Eastern Standard Time   one yr    Sun Jan 22 2012 15 16 01 GMT-0500  Eastern Standard Time    The year has Dec 22 112 -     The month is correctly displaying Jan 22 2012   If you want to tinker with it  http   jsbin com alezaj edit javascript html live   This is in Chrome and Firefox   Thanks

User · Answer

Using some of the answers on this page and here, I came up with my own answer as none of these answers fully solved it for me.

Here is crux of it

var startDate = "27 Apr 2017";
var numOfYears = 1;
var expireDate = new Date(startDate);
expireDate.setFullYear(expireDate.getFullYear() + numOfYears);
expireDate.setDate(expireDate.getDate() -1);

And here a a JSFiddle that has a working example: https://jsfiddle.net/wavesailor/g9a6qqq5/

User · Answer

In very simple way  use this code      define function  function nextYearDate date1        var date2   new Date date1       var date3   date2 setDate date2 getDate   - 1       var date   new Date date3       var day   date getDate        var month   date getMonth   1      var year   date getFullYear   1      var newdate   year    -     month  lt  10    0          month    -     day  lt  10    0          day          next date   val newdate        call function   lt input type  date  name  current date  id  current date  value    onblur  nextYearDate this value      gt    lt input type  date  name  next date  id  next date  value    onblur  nextYearDate this value      gt

User · Answer

Use this   var startDate   new Date        startDate setFullYear startDate getFullYear   - 1

User · Answer

This will create a Date exactly one year in the future with just one line  First we get the fullYear from a new Date  increment it  set that as the year of a new Date  You might think we d be done there  but if we stopped it would return a timestamp  not a Date object so we wrap the whole thing in a Date constructor   new Date new Date   setFullYear new Date   getFullYear     1

User · Answer

Use setFullyear as others have posted but be aware this returns a timestamp value not a date object  It is also a good candidate imho to add functionality via the prototype  This leads us to the following pattern   Date prototype addYears   function n        var now   new Date        return new Date now setFullYear now getFullYear     n        console log  Year from now is   new Date   addYears 1

User · Answer

As setYear   is deprecated  correct variant is      plus 1 year new Date   setFullYear new Date   getFullYear     1     plus 1 month new Date   setMonth new Date   getMonth     1     plus 1 day new Date   setDate new Date   getDate     1    All examples return Unix timestamp  if you want to get Date object - just wrap it with another new Date

User · Answer

2020 It s perfect date time library called Moment js with this library you can simply write  moment   subtract 1  year    and call any format you wish  moment   subtract 1  year   toDate   moment   subtract 1  year   toISOString    See full documentation here  https   momentjs com

User · Answer

You should use getFullYear   instead of getYear    getYear   returns the actual year minus 1900  and so is fairly useless    Thus a date marking exactly one year from the present moment would be   var oneYearFromNow   new Date    oneYearFromNow setFullYear oneYearFromNow getFullYear     1     Note that the date will be adjusted if you do that on February 29   Similarly  you can get a date that s a month from now via getMonth   and setMonth    You don t have to worry about  rolling over  from the current year into the next year if you do it in December  the date will be adjusted automatically  Same goes for day-of-month via getDate   and setDate

[javascript] How to determine one year from now in Javascript

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