show log time every request in Express?

I've some problem in here. I don't know why this is happened. I put timestamps code with Moment.js library, not only with that library, recently i created manually for showing timestamps but when i send request, time not updated. I put datetime in my file route. But this is work in server file.

So for example

server.js

var express = require('express')
var app = express()
var moment = require('moment')

app.use(function(req, res, next){
  console.log(moment().format('HH:mm:ss') + ' From server.js') //Showing time now
  next();
  })

app.use('/', index)
app.listen(8001)

routes/index.js

var express = require('express')
var app = express()
var router = express.Router()
var moment = require('moment')

router.get('/', function(req, res){
  console.log(moment().format('HH:mm:ss') + ' From routes/index.js')
})

module.exports = routes

And i begin test for my code for first time GET localhost:8001/

My system time showing 16:20:51

[nodemon] 1.11.0
[nodemon] to restart at any time, enter `rs`
[nodemon] watching: *.*
[nodemon] starting `node ./bin/www`
16:20:51 From Server.js
16:20:51 From routes/index.js

And the second request my system time showing 16:22:52

[nodemon] 1.11.0
[nodemon] to restart at any time, enter `rs`
[nodemon] watching: *.*
[nodemon] starting `node ./bin/www`
16:22:52 From Server.js
16:20:51 From routes/index.js

Nah, the second request still get existing time log from first request, this is only happened in routes. But work with well in server.js

Any idea? Thanks

via Ade Firman Fauzi