Categories Science To Every Thing There is a Season: But Why? Post author By [E] Hillary Post date Tuesday, October 23rd, 2012 3 Comments on To Every Thing There is a Season: But Why? It’s fall here in the northern hemisphere, but have you ever wondered why the seasons fall when they do? Tags aphelion, earth's axial tilt, earth's orbit, equinoxes, perihelion, seasonal lag, seasons, solstices