Use the word "uneventful" to explain that nothing interesting happened for a certain period. Use it like this:

A: Did anything interesting happen?

B: Not really. It was pretty uneventful.

Although it means that nothing interesting happened, "uneventful" doesn't sound negative. It sounds neutral or even a little positive.

You can use "uneventful" to talk about things like:

• your work day
• a sports match
• a trip