Excel

-- Convertir UNIX epoch a fecha en Excel

=(((E2-(6*3600))/86400)+25569)

    E2 = cell reference
    6 = Timezone Offset (this is Central Standard time)
    3600 = Number of seconds in an hour
    86400 = Number of seconds in a year
    25569 = Excel hack because excel counts epoch from 1/1/1900 and most others start at 1/1/1970.