phpjs/experimental/datetime/localtime.js

php.js offers community built php functions in javascript

function localtime(timestamp, is_assoc) {
  // http://kevin.vanzonneveld.net
  // +   original by: Brett Zamir (http://brett-zamir.me)
  // +  derived from: Josh Fraser (http://onlineaspect.com/2007/06/08/auto-detect-a-time-zone-with-javascript/)
  // +      parts by: Breaking Par Consulting Inc (http://www.breakingpar.com/bkp/home.nsf/0/87256B280015193F87256CFB006C45F7)
  // +   improved by: Ryan W Tenney (http://ryan.10e.us)
  // *     example 1: localtime();
  // *     returns 1: [50,28,0,14,2,109,6,73,0]
  var t, yday, x, o = {};

  if (timestamp === undefined) {
    t = new Date();
  } else if (timestamp instanceof Date) {
    t = timestamp;
  } else {
    t = new Date(timestamp * 1000);
  }

  x = function(t, m) {
    var a = (new Date(t.getFullYear(), 0, m, 0, 0, 0, 0)).toUTCString();
    return t - new Date(a.slice(0, a.lastIndexOf(' ') - 1));
  };

  yday = Math.floor((t - new Date(t.getFullYear(), 0, 1)) / 86400000);

  o = {
    'tm_sec': t.getSeconds(),
    // seconds
    'tm_min': t.getMinutes(),
    // minutes
    'tm_hour': t.getHours(),
    // hour
    'tm_mday': t.getDate(),
    // day of the month, 1 - 31
    'tm_mon': t.getMonth(),
    // month of the year, 0 (January) to 11 (December)
    'tm_year': t.getFullYear() - 1900,
    // years since 1900
    'tm_wday': t.getDay(),
    // day of the week, 0 (Sun) to 6 (Sat)
    'tm_yday': yday,
    // day of the year
    'tm_isdst': +(x(t, 1) != x(t, 6)) // is daylight savings time in effect
  };

  return is_assoc ? o : [
    o.tm_sec, o.tm_min, o.tm_hour, o.tm_mday, o.tm_mon, o.tm_year, o.tm_wday, o.tm_yday, o.tm_isdst];
}