Someone from a CB may want to weigh in here. I'll explain what I understand.
CBs are required to provide requirements for use of certification marks, including the ISO terminology as well as the use of the CB seal and the AB seals.
Auditors are required to check on the use of the marks.
Some CBs don't take this responsibility seriously. When I have recommended that a consulting client ask their CB for a copy of the document the CB is required to have developed, they have always been able to obtain one.
Roughly a year ago, I noticed in the document provided by one of the CBs that the year no longer needs to be included and was specifically so stated in the document.
It appears that the ISO web site does not reflect that change yet as shown on the link someone else provided.
I'm sure that the CB did not make it up, as they also state that they would prefer that the date be included. I don't know if this was ISO driven or AB driven, but I'm sure it came from one or the other or both.
So to the OP, I strongly suggest that you ask your CB and also ask for their document that explains the proper use of the certification marks.