Decompose second to time units

timeDecompose.js

function timeDecompose(s, toString) {
    toString = Boolean(toString) || false;
    s = Number(s);

    var time = {};
    time.year = Math.floor(s / 3.154e7);
    time.month = Math.floor(s % 3.154e7 / 2.628e6);
    time.day = Math.floor(s % 3.154e7 % 2.628e6 / 86400);
    time.hour = Math.floor(s % 3.154e7 % 2.628e6 % 86400 / 3600);
    time.minute = Math.floor(s % 3.154e7 % 2.628e6 % 86400 % 3600 / 60);
    time.second = Math.floor(s % 3.154e7 % 2.628e6 % 86400 % 3600 % 60);

    if (toString) {
        var output = '';
        for (var unit in time) {
            if (time[unit]) {
                output += time[unit];
                output += ' ' + unit;
                if (time[unit] > 1)
                    output += 's';
                output += ' and ';
            }
        }
        output = output.replace(/ and $/, '');
        return output;
    }
    return time;
}

timeDecompose

Decompose seconds to time units using timeDecompose.

Usage

timeDecompose accepts two parameters.

1. (Number) Seconds want to decompose.
2. (Boolean) true returns human-readable String, otherwise and as default returns an Object.

Examples

timeDecompose(123456789);
// { year: 3, month: 10, day: 29, hour: 14, minute: 13, second: 9 }

timeDecompose(123456789, true);
// "3 years and 10 months and 29 days and 14 hours and 13 minutes and 9 seconds"

---

Calculate the age:

var today = new Date();
var birthdate = new Date(1993, 3, 21, 18) // March 21, 1993 at 6 PM

// getTime() will get the date in milliseconds, so divide by 1000:
var seconds = (today.getTime() - birthdate.getTime()) / 1000;

timeDecompose(seconds, true);