I always use the phrase less than perfect in a sarcastic way, meaning that something is not good at all. For example:
My date was obviously less than perfect. She was late and in a hurry, and she kept talking about her ex-boyfriend.
But I start to wonder if this phrase can be used in a non-sarcastic way, as a parallel to almost perfect. As an example, could it be used in this context?
Enjoy your day to its fullest. If anybody in the office makes your day less than perfect, go and talk to them.