do not think that way; it's not so bad if you are the first to mention to celebration. I am the one who always mention to celebrate too for any of the occasion even for our wedding anniversary or even my birthday. Someone in the relationship got to do it, right? As long as your partner enjoy what ever you have planned.
Yes I understand but when you decide to go out with him, you should already know what kind of person he is. Some guys just do not care about those things. He might think you like to plan it or he is used to you planning it;
If you think it is very important for you, discuss this with him. Communication is very important for couples. Do not just be silent about it.