I wouldn't necessarily attribute his forgetting to being a JW. He may have "forgotten" because he's a JW, and you're an UBM, and he may just have really just forgotten. Also, as tiki pointed out, many people put off a personal weekly holiday celebration (anniversary, birthday), and prefer to celebrate the occasion on a weekend, where they can relax and enjoy it without the stress and demands of a regular work day interfering. This does not keep a husband, however, from wishing his wife a "happy anniversary", giving her flowers, or doing/giving some other little affectionate token on their actual anniversary.
You didn't specify anywhere that I saw, is he a busy guy? Does he have a demanding job? Is he sometimes forgetful? Any unusual stress factors come up in his life recently? These all could be reasons he forgot.
I am not a marriage counselor, nor would I ever presume to know your complete situation, but from what you've posted I will say this. It's obvious from your recent posts that you are struggling with him. Imo, this post seems like you are looking for a reason to find fault and attribute it to his being a JW. Perhaps you should take some time and consider whether or not you still love him and want to remain his wife. If so, maybe some counseling is in order. Understand, I am not saying this is your fault whatsoever. From your previous post in reference to him and your marriage, he is the one who's made a drastic change by going back to being a JW. That's really not fair to you. Your hurt and blame are completely understandable. But it's not healthy to allow those feelings and thoughts to fester until it becomes gangrenous and causes irreparable damage.
I sincerely hope you find a way to work things out.