The bed is broken. Do I need to look at the date and have it repaired?

Change it when it is dirty. I don't pay much attention to it. Don't listen to some superstitious statements. I think I can change it at the right time. I don't need to watch the weather. It is best to change it in sunny days, because it is convenient to dry after washing, and it dries faster in sunny days, and ultraviolet rays can sterilize it. Leave it alone, just let nature take its course.