Add A Year To Today's Date

I am trying to add a year to todays date. I am working in a system that does not allow you to use standard JavaScript.

For instance, to get todays date I have to use:

javascript:now();

I have tried:

javascript:now(+1);

I have never seen this before, but am in need of adding one year to todays date...

Has anyone seen getting current date this way before? And if so, how could I add a year?

You can create a new date object with todays date using the following code:

var d = new Date();
    console.log(d);

// => Sun Oct 11 2015 14:46:51 GMT-0700 (PDT)

If you want to create a date a specific time, you can pass the new Date constructor arguments

 var d = new Date(2014);
    console.log(d)

// => Wed Dec 31 1969 16:00:02 GMT-0800 (PST)

If you want to take todays date and add a year, you can first create a date object, access the relevant properties, and then use them to create a new date object

var d = new Date();
    var year = d.getFullYear();
    var month = d.getMonth();
    var day = d.getDate();
    var c = new Date(year + 1, month, day);
    console.log(c);

// => Tue Oct 11 2016 00:00:00 GMT-0700 (PDT)

You can read more about the methods on the date object on MDN

Date Object

Use the Date.prototype.setFullYear method to set the year to what you want it to be.

For example:

const aYearFromNow = new Date();
aYearFromNow.setFullYear(aYearFromNow.getFullYear() + 1);
console.log(aYearFromNow);

There really isn't another way to work with dates in JavaScript if these methods aren't present in the environment you are working with.

One liner as suggested here

https://stackoverflow.com/questions/8609261/how-to-determine-one-year-from-now-in-javascript by JP DeVries

new Date(new Date().setFullYear(new Date().getFullYear() + 1))

Or you can get the number of years from somewhere in a variable:

const nr_years = 3;
new Date(new Date().setFullYear(new Date().getFullYear() + nr_years))

This code adds the amount of years required for a date.

var d = new Date();
// => Tue Oct 01 2017 00:00:00 GMT-0700 (PDT)

var amountOfYearsRequired = 2;
d.setFullYear(d.getFullYear() + amountOfYearsRequired);
// => Tue Oct 01 2019 00:00:00 GMT-0700 (PDT)

I like to keep it in a single line, you can use a self calling function for this eg:

If you want to get the timestamp of +1 year in a single line

console.log(
  (d => d.setFullYear(d.getFullYear() + 1))(new Date)
)

If you want to get Date object with single line

console.log(
  (d => new Date(d.getFullYear() + 1, d.getMonth(), d.getDate()))(new Date)
)

In Angular, This is how you Calculate Date

today = new Date();
year = this.today.getFullYear();
month = this.today.getMonth();
day = this.today.getDate();
//To go 18 years back
yearsBack18= new Date(this.year - 18, this.month, this.day);

//To go to same day next year
nextYear= new Date(this.year + 1, this.month, this.day);

    var d = new Date();
    var year = d.getFullYear();
    var month = d.getMonth();
    var day = d.getDate();

    var fulldate = new Date(year + 1, month, day);

    var toDate = fulldate.toISOString().slice(0, 10);

    $("#txtToDate").val(toDate);

    output : 2020-01-02

//This piece of code will handle the leap year addition as well.

function updateExpiryDate(controlID, value) {
    if ( $("#ICMEffectiveDate").val() != '' &&
        $("#ICMTermYears").val() != '') {

        var effectiveDate = $("#ICMEffectiveDate").val();
        var date = new Date(effectiveDate);
        var termYears = $("#ICMTermYears").val();

        date = new Date(date.setYear(date.getFullYear() + parseInt(termYears)));
        var expiryDate = (date.getMonth() + 1) + '/' + date.getDate() + '/' + date.getFullYear();
        $('#ICMExpiryDate').val(expiryDate);
    }
}

var yearsToAdd = 5;
var current = new Date().toISOString().split('T')[0];
var addedYears = Number(this.minDate.split('-')[0]) + yearsToAdd + '-12-31';