Timestamp-Microservice/convert.js at master · Kenttleton/Timestamp-Microservice · GitHub

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/*
Convert module converts dates from one form to another.
convert.unixtonatural(unix in seconds) returns a natural date
convert.naturaltounix(natural) returns a unix date in seconds
*/
var convert = {
  year: 0,

  day: 0,

  month: "",

  dom: 1,

  natural: "",

  unix: 0,

  noLeap: [1, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334],

  leap:   [1, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335],

  montharr: ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"],

  monthindex: 0,

  isleap: false,

  unixtonatural: function(unix){
    this.unix = unix;
    this.year = Math.floor((this.unix / 31557600) + 1970);
    this.day = Math.round((this.unix % 31557600)/86400) + 1;
    if(this.year % 4 == 0){
      this.isleap = true;
    }
    else{
      this.isleap = false;
    };

    if(this.isleap == true){
      for(var i = 0; i <= 11; i++){
        if(this.leap[i] <= this.day){
          this.monthindex = i;
        }
      }
      this.month = this.montharr[this.monthindex];
      this.dom = (this.day - this.leap[this.monthindex]) + 1;
    }
    else{
      for(var i = 0; i <= 11; i++){
        if(this.noLeap[i] <= this.day){
          this.monthindex = i;
        }
      }
      this.month = this.montharr[this.monthindex];
      this.dom = (this.day - this.noLeap[this.monthindex]) + 1;
    };

    this.natural = this.month + " " + this.dom + ", " + this.year;
    return this.natural;
  },

  naturaltounix: function(natural){
    this.natural = natural;
    this.unix = Date.parse(this.natural)/1000;
    return this.unix;
  }
};

module.exports = convert;