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const addYears = require('date-fns/fp/addYears')
const dateFns = require('date-fns/fp')
const formatWithOptions = dateFns.formatWithOptions
const eo = require('date-fns/locale/eo')

const addFiveYears = addYears(5)
const dateToString = formatWithOptions({ locale: eo }, 'd MMMM yyyy')

const dates: Date[] = [
  new Date(2017, 0 /* Jan */, 1),
  new Date(2017, 1 /* Feb */, 11),
  new Date(2017, 6 /* Jul */, 2)
]

const formattedDates: string = dates
  .map(date => dateToString(addFiveYears(date)))
  .join(', ')

console.log(formattedDates === '1 januaro 2022, 11 februaro 2022, 2 julio 2022')