After that, you can be sure that spring will arrive again. This repeating pattern determines when we sow seeds and when we harvest. But this would not result in a particularly successful crop. There are specific times which are conducive to certain physical activities. Conceptually, we could portray this repeating pattern as cyclical or circular.
Planet Earth moves in an approximate circular path around the sun.
It is this cyclical path, repeating itself annually, that produces the cycle of the seasons. The agricultural calendar, therefore, is certainly not drawn arbitrarily. It is based on a repetitive and predictable set of circumstances. We do not sow seeds in autumn in commemoration of an event gone by. Rather, we sow seeds in autumn because this is the right time for this activity, because this autumn provides the correct environmental conditions in the same way as last year's autumn.