PPPPpppp solo me da PPPPpppp

dateFns.format(new Date(), 'PPPPpppp')

Cargando desde cdn con:

<script src="https://cdnjs.cloudflare.com/ajax/libs/date-fns/1.30.1/date_fns.min.js" integrity="sha512-F+u8eWHrfY8Xw9BLzZ8rG/0wIvs0y+JyRJrXjp 3VjtFPylAEEGwKbua5Ip/oiVhaTDaDs4eU2Xtsxjs/9ag2bQ==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>

La salida que obtengo es solo PPPPpppp