2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/83956We introduce two time: deterministic Newton time-stream t and stochastic time-epoch $τ$. The relation of uncertainty for time-epoch of physical events $ΔτΔD \geq c_1,\eqno(*)$ where $c_1=const$, is proved. The function $D(t)= - c_1\frac{d}{dt}\ln f_τ(t),$ characterizes {\it velocity of disorganization} of the event-phenomena; $f_τ(t)$ is density of probability of time-epoch $τ$. The relation (*) is verified not by means of experiment that is traditional for physics, but with the help of the reference to datas of historical science.6 pages, LaTeX2eGeneral Physicstext