I think the main point is, that there is nothing official.
Anyone who dumbly follows something without understanding its origins and purpose is part of the problem.
Also at the moment, despite a few very active and effective groups, current feminism is very passive and accepting.
Its the same as when complaining that only right wing papers report of sex based rights, when the real issue is why doesn't the left do anything.
So as I have been trying to say, on one level you dont have to follow either the marketing web site or the UN.
The real problem is that women dont see themselves as initiators.
If you want to celebrate IWD do it for your own reasons. For all I know is some areas women will prioritise closure of services.
ie I am trying to stimulate what used to be usual.
If we really care about anything then promote that.
Dont just step in line with everyone else.
If we all did that, then it would be come obvious that those using the marketing slogan are not really committed or interested in what women really want. They are just empty performers of a meaningless ritual.