Absolute Timeline.

Einstein dreamed that the laws of physics were tied to something absolute.He thought that this was the speed of light.But the speed of light can also change.But τ_CMB is a real, measurable quantity.It is not postulated, but calculated from observable data. On the basis of the principle of chronal dynamics τ = ħ / E, it is shown that the CMB radiation sets the natural time scale for the current epoch: τ_CMB = ħ / (k_B T_CMB) ≈ 2.8 × 10⁻¹² s. Implications for cosmology, metrology, and fundamental physics are discussed.