Can you use 丰富 to describe a day?
丰富的一天 - an eventful day with plenty activities but you may not get anything positive out of them.

充实的一天 - perhaps not as many activities as in 丰富的一天 but you actually get something positive from part-taking in the day's activities.

It does sound a bit odd to say “今天过得好丰富？“. Perhaps "今天是丰富的一天" sounds better.