I have a type of bipolar that swings up and down all day long. There are significant mood swings within a day, within a week, within a month. I go through at least four major episodes a year. That's really the definition of bipolar rapid cycle. But I have ultra-rapid, so I have tiny little episodes all day long.
I probably have a higher opinion of my writing than the average person, at least when I'm in a good mood, but I don't really think of my plays as only being relevant to a particular month or year.