What does 算不上 mean in 算不上太美好的日子? This is from the book 我是马拉拉 (the Chinese version of I am Malala).



I transcribe it to:


  2012年10月9日，星期二那天发生的事情，改变了一切。那天原本要大考，对学生们来说算不上太美好的日子。但和大多数同学不一样，我号称“小书虫”，感觉考试并不是什么大事。


I translate this to:


  Tuesday, 9-th October 2012.  That day's happenings changed everything.  That day, we originally had a test, with students saying [something? 算不上], it's a beautiful day.  But I'm different to most students, I'm known as "bookworm", I feel a test is not at all a big deal.


Question: What does 算不上 mean in this snippet?

Dict.cn translates 算不上 to "be not really", so I'm guessing it negates the "it's a beautiful day", so the students think it's "not really a beautiful day" or something like that.  However, I'm not clear on this.  (I think I understand the rest of the snippet.)
I would translate 算不上 to be "cannot count as", so in your context, it would mean "you can't count today as a beautiful day as there is an exam".