I am Dutch and you are right. Alternatives would be: 'Prettige Kerstdagen' or for Roman Catholics 'Zalig Kerstfeest'
and so it is, ( zo is het)
fully agree (Belguim)
I goggled it and you are right. It means Merry Christmas. I do not know the the Dutch language so if you want to wait till one of the Cuties from that part of the world chimes in to make sure that's OK 😊
In this case Google is right. But you are right not to trust it completely.
My thoughts exactly, thank you