text: /* https://stackoverflow.com/questions/8083410/how-can-i-set-the-default-timezone-in-node-js */
  Date.prototype.toIsoString = function() {
      const tzo = - this.getTimezoneOffset();
      const dif = tzo >= 0 ? '+' : '-';
      
      const pad = function(num, digits = 2) {       
          const norm = Math.floor(Math.abs(num)).toString();
          return norm.padStart(digits, '0');
      };
      
      return this.getFullYear() +
          '-' + pad(this.getMonth() + 1) +
          '-' + pad(this.getDate()) +
          'T' + pad(this.getHours()) +
          ':' + pad(this.getMinutes()) +
          ':' + pad(this.getSeconds()) +
          '.' + pad(this.getMilliseconds(), 3) +
          dif + pad(tzo / 60) +
          ':' + pad(tzo % 60);
  }
  