在今天的日期上加一年

Question

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?

Answer 1

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

Answer 2

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.

Answer 3

One liner as suggested here

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))

Answer 4

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)

Answer 5

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) )

Answer 6

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);

Answer 7

    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

Answer 8

In case you want to add years to specific date besides today's date using either years, or months, or days. You can do the following

var christmas2000 = new Date(2000, 12, 25); 
christmas2000.setFullYear(christmas2000.getFullYear() + 5); // using year: next 5 years
christmas2000.setFullYear(christmas2000.getMonth() + 24); // using months: next 24 months
christmas2000.setFullYear(christmas2000.getDay() + 365); // using days: next 365 months

Answer 9

//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);
    }
}

Answer 10

Function

var date = new Date();

var year = date.getFullYear();

var month = date.getMonth();

month = month + 1;

if (month < 10) {
    month = "0" + month;
} 

var day = date.getDate();

if (day < 10) {
    day = "0" + day;
} 

year = year + 1;

var FullDate =  year + '/' + month + '/' + day; 

Answer 11

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