[mytailorisrich]

"EU countries are obliged to guarantee a permanent, affordable, universal postal service everywhere within their territory, i.e. they have to guarantee as a minimum the following:

- a service (collection from access points and delivery) on 5 working days a week (with exceptions);

- the collection, sorting, transport and delivery of postal items weighing up to 10 kg;

- services for registered and insured items." [1]

That being said, obviously the specific number of days is not important here.

[1] https://eur-lex.europa.eu/EN/legal-content/summary/postal-se...