sun flowers!

In Japan there are four seasons, spring, summer, autumn, and winter.I watched TV and knew that a sun flower has bloomed and other flowers don't recognize that we are in winter now.Some trees still change colour and hold red leaves like autumn.I think it is just a little part of problems and it is visible.I can't see other problems right now.There are 365days in a year,and 90days should be winter.If we can't feel four seasons, what does happen next?