I think forgetting is one thing, but then trying to place blame on others instead of admitting "Oops so sorry I forgot" is more the issue. Going by another thread from this OP, her mother is trying to claim Op is ashamed of her son because her mother is telling every tom **** and harry OP's personal situation about her son. Now she's trying to tell the OP she told her the wrong date for her own son's birthday. This isn't about a simple 'human error' mistake, i am getting the feeling the OP's mother is playing some nasty head games with her. OP I hope you are able to try and disconnect a little from your mother. I think she needs help.