2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/2545The early stage of the Universe is discussed and the time lengths of its first days are given. If we denote the Hubble time in the zero-gravity limit by T (approximately 12.16 billion years), and T(n) denotes the length of the n-th day, then we have the very simple relation T(n)=T/(2n-1). Hence we obtain for the first days the following lenghts of time: T(1)=T, T(2)=T/3, T(3)=T/5, etc.3 pages, LaTeX. Presented at the Conference "Astrophysical Ages and Time Scales"Astrophysicstext