Express JS Show all events in JSON format

var Jsonresult = {};
app.get('/trips', function(req1, res1) {
for (var i = 0; i < events.length; i++) {
    var event = events[i];
    var start = event.start.dateTime || event.start.date;
    console.log('%s - %s', start, event.summary);
    Jsonresult.event = event.summary;
    Jsonresult.datetime = start;
    res1.json([Jsonresult]);
  }
  res1.end();
}

I am getting events from google calendar. In console showing all events but In POSTMAN showing one data only. I want to get all results as json format but i am getting only one result from the forloop. Please help me.

I am expecting Results like:

[{
"event": "Daily Meeting",
"datetime": "2017-04-25T10:00:00+05:30"
},
{
"event": "Daily Call",
"datetime": "2017-06-26T10:00:00+05:30"
},
{
"event": "Office Meeting",
"datetime": "2017-05-27T10:00:00+05:30"
}]

But its showing only one result in POSTMAN like :

[{
"event": "Daily Meeting",
"datetime": "2017-04-25T10:00:00+05:30"
}]

via Ram Android