Philochrony (from Greek philo: friend and khronos: time) is the theory that describes the nature of time and demonstrates its existence. According their duration things are classified in: Eternal, durable, perishable, ephemeral, fleeting and nonexistent. The concept of Philochrony was created on March 13, 2009. The concept of change-interval dualitiy on June 30, 2019.
