Basic Node and Express: handler vs middleware

1

This code uses a middleware function AND a handler. (handler chained to middleware function ?)

app.get('/now', function(req,res,next) {
  req.time = new Date().toString();
  next();
}, function(req,res) {
    res.send({"time":req.time})
})

Would this still be the same if we used only a handler?
So what does the middleware function add?

app.get('/now', function(req,res) {
  req.time = new Date().toString();
  res.send({"time":req.time});
});