code: public Date getCoreReloadDateTimeAsDate(TimeZone tz)
      {
          if (coreReloadDate == null || coreReloadTime == null)
          {
              return null;
          }
  
          return DateUtil.parseDateTime(coreReloadDate + " " + coreReloadTime, tz);
      }
docs: Returns the date the server (core module) was last reloaded.<p>
  If either the date or time property is <code>null</code> (e.g. on Asterisk prior to 1.6.3) this method
  returns <code>null</code>.
  
  @param tz the time zone of the Asterisk server, <code>null</code> to use the default time zone.
  @return the date the server (core module) was last reloaded or <code>null</code> if not available.
  @see #getCoreReloadDate()
  @see #getCoreReloadTime()