code: function mktime () {
      var oldTz = process.env.TZ;
      exports.tzset(this.getTimezone());
      zoneInfo.isDaylightSavings = -1; // Auto-detect the timezone
      var t = exports.mktime(zoneInfo);
      if (oldTz) {
        exports.tzset(oldTz);
        oldTz = null;
      }
      return this.setTime( (t * MILLIS_PER_SECOND) + this.getMilliseconds() );
    }
docs: 'mktime' calls 'reset' implicitly through 'setTime()'