what time is it?

It must be four o'clock because the flowers on this four o'clock plant are open. The flowers open in the late afternoon around four o'clock and thus the name of the flowers is four o'clock. It is always fascinating to me how flowers know when to open and when to close since they don't have a brain or nervous system. And how do they accomplish this motion of the petals since they don't have muscles? And I believe that the sunflower plant will actually follow the sun. I really don't know if that is true, but I have heard it. The colors of these flowers are so bright. This is how they look before four o'clock. Closed up tight and as snug as a bug in a rug. Lew