How can I calculate a future date based on a form entry using JavaScript?

Question

Using JavaScript, I need to calculate a date in the future (two years minus one day) based on the date a user enters into a form. Any suggestions?

What format has the date entered in the form?

Skwal
– Skwal

2014-01-29 17:12:39 +00:00
Commented Jan 29, 2014 at 17:12 — Skwal
– Skwal, Commented Jan 29, 2014 at 17:12

ced-b · Accepted Answer · 2014-01-29 17:15:36Z

1

I recommend using a library for this such as date.js or moment.js.

answered Jan 29, 2014 at 17:15

ced-b

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Joeytje50 · Accepted Answer · 2014-01-29 17:24:23Z

1

You can do this without any libraries using the Date object:

var d = new Date(inputValue);
d.setYear(d.getFullYear() + 2);
d.setDate(d.getDate() - 1);
alert(d.toString()); // Thu Jan 28 2016 <timestamp/timezone>

The inputValue would be the date entered, but it would need to be an accepted format, such as MM-DD-YYYY.

You will need d.getFullYear on the second line, since .getYear would return 114 right now (years since 1900).

edited Jan 29, 2014 at 17:24

answered Jan 29, 2014 at 17:18

Joeytje50

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OverlappingElvis · Accepted Answer · 2014-01-29 17:14:58Z

0

Use moment.js! It's a great library for formatting and manipulating dates.

answered Jan 29, 2014 at 17:14

OverlappingElvis

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