misc.js.flow

// @flow

const format = require('date-fns').format
const eo = require('date-fns/locale/eo')

const dateString : Date = new Date(2017, 0, 25, 21, 28, 15)
const formatString : string = 'dd.MM.yyyy HH:mm:ss'
const result : string = format(new Date(2017, 0, 25, 21, 28, 15), 'eeee, dd MMMM HH:mm:ss', {locale: eo})
console.log(result === 'merkredo, 25 januaro 21:28:15')