Hi Ville,
For what it's worth, the same CoC recommends respectful and constructive communication. In particular, it notes
> Remember that Fuchsia is a geographically distributed team and that you
> may not be communicating with someone in their primary language.
Because of this, although a more inclusive seasonal greeting is possible, I'm optimistic that your intent was well-received by the list. Thank you in any case for your acknowledgement :).
Apart from Shai's message, I can also refer you to:
That said, Shai's reply likely best answers the "retail" part of your question.
Kind regards,
--dho