Can the broken house in the solar calendar be decorated?

If you pay attention to feng shui, don't pretend. You'd better do it after July. Or if you are considering decorating, find a Feng Shui master to have a look.

July is Ghost Festival, so those new things will not be decorated at this time.

You're right downstairs, but you know it. If you don't believe it, you don't. The key is to look at yourself.