Why people have kept track of time since ancient times?

People needed time counting in order to know when to plant certain seeds, wheat, potatoes, sunflowers and many others. In addition to sowing, it was necessary to monitor the preparation of stocks for the winter and feed for domestic animals (cows, pigs, goats). It was necessary to dry the hay, collect the seeds. All this was done according to their time schedule. Since there were no clocks in ancient times, people needed to keep track of the time to know what day, month, year it was. When what holidays, important events.