Timestamp algorithm based on UNIX TIMESTAMP

timestamp-Algorithm.js

/**
 * TIMESTAMP Algorithm.
 * @author Daniel Vera Morales
 * 
 * WARNING: This script is for demonstration and educational purpose, it is not a stable version.
 */
// Testit using: http://www.unixtimestamp.com/index.php
// Explanation taken from: http://www.devshed.com/c/a/administration/unix-time-format-demystified/


var yearFrom = 1970;
var yearTo=2017; // change

var monthFrom=01;
var monthTo=01; // change

var dayFrom=01;
var dayTo=02; // change

var hour = 21;
var minute = 30;
var seconds = 21;

// Algolas

var yearLeap = parseInt((yearTo - yearFrom)/4);

// ACUMULAO de dias en años
var yearTimeStamp = ((yearTo - yearFrom) * 365 ) + yearLeap;

// ACUMULAO de dias en meses
// variara segun la cantidad de dias en febrero y si es año biciesto, así como el número de dias de cada mes
// por ahora esta bien pero no es correcto el timestamp
var daysInMonths = [31,29,31,30,30,30,30,30,30,30,30,31];
var monthsToAdd = (monthTo - monthFrom) - 1;
var calculatedDays = 0;

for(var i = 1; i < monthsToAdd; i++ )
{
	calculatedDays += daysInMonths[i];
}

// Agregando los dias de los años a los dias en meses
var monthTimeStamp =  (calculatedDays + dayTo);

// date timestamp
var datetimestamp = (monthTimeStamp + yearTimeStamp)  * 24 * 60 * 60;

// time timestamp
var hourStamp = 21 * 60 * 60;
var minuteStamp = minute * 60;

var timeTiestamp = hourStamp + minuteStamp + seconds;

// timestamp
var timestamp = timeTiestamp + datetimestamp;

console.log(timestamp);