Unseen by anyone, the Defense Professor’s lips curved up in a thin smile. Despite its little ups and downs, on the whole this had been a surprisingly good day
From Ch. 46, after Harry destroys the dementor:
I must admit, Mr. Potter, that although it has had its ups and downs, on the whole, this has been a surprisingly good day.
This is interesting. From the end of Ch. 89:
From Ch. 46, after Harry destroys the dementor:
Every day that Harry kills something is a good day, of course.