Should calendar always be generic or individual specific? Why or why not?

Generic classification is a misnomer when applied to human population. Evidentially, numerous factors influence human beings behavioral patterns. Unfortunately, researchers do not know that they have limited knowledge. Bold enough, they came up with generic calendar. That was a humongous miscalculation in content and presentation to the population.   Empirically, everyone has his/her entry and exit calendar. Therefore, the generic calendar is an inaccurate definition in our generation sphere. Sincerely, everyone should have their own calendar because, even identical twins have their different calendars. Just think about this folks! Welcome to www.provocativedebate.com.

The only thing that is constant is change. Inventions occur based on the knowledge and understanding of the era in question. The age of technology has relegated ideas and inventions of the past to nothing. On this note, should calendar always be generic or individual specific? The idea of a generic calendar was limited to the generation at the time. .   Sincerely, the idea only serve the purpose of the past. However, the generic calendar does not conform with the dictate of our age. Honestly,  everyone should  have the benefit of individual calendar. The world is fast changing and we must be in time to align with the trend.