I wish there were different words for the different types of forgetting because when I say I forgot something, I don’t mean “I forgot we had plans on Friday.” I almost always mean “I forgot today was Friday.” I know my friend’s birthday is on March 20th, but I won’t wish her happy birthday on time because I won’t know it’s March 20th on March 20th. My forgetfulness has nothing to do with not caring about/remembering events and everything to do with my inability to keep up with the passage of time.
My most common one is being 100% certain I did the thing already because the memory of doing it and the memory of intending to do it are the same mental images.