import addYears from 'date-fns/fp/addYears' ; import formatWithOptions from 'date-fns/fp/formatWithOptions' ; import parseISO from 'date-fns/fp/parseISO' ; import eo from 'date-fns/locale/eo' ; import compose from 'lodash/fp/compose' ; import toUpper from 'lodash/fp/toUpper' ; import isEqual from 'lodash/isEqual' ; const addFiveYears = addYears ( 5 ) ; const dateToString = formatWithOptions ( { locale : eo } , 'd MMMM yyyy' ) ; const dates = [ '2017-01-01' , '2017-02-11' , '2017-07-02' ] ; const formattedDates = dates . map ( compose ( toUpper , dateToString , addFiveYears , parseISO ) ) ; console . log ( isEqual ( formattedDates , [ '1 JANUARO 2022' , '11 FEBRUARO 2022' , '2 JULIO 2022' ] ) ) ;