code: function tzdate (date) {
    var match;
    if (match = /^TZ="(\S+)"\s+(.*)$/.exec(date)) {
      var a = match.slice(1, 3).reverse();
      return a;
    }
    return date;
  }
docs: GNU `date` has a nice feature where you can specify the timezone of a date string using `TZ` like so `'TZ="America/Detroit" 1999-12-01 20:00'`. This allows you to store a string with a timezone. *Extract a specified timezone from a date string.*