With the completion of the Hubble Space Telescope (HST) Key Project on the Extragalactic Distance Scale, it is interesting to form the dimensionless quantity H₀t₀ by multiplying the Hubble Constant by the age of the Universe. In a matter dominated decelerating Universe with a density exceeding 0.26 of the critical value, H₀t₀ < 1; in an accelerating Universe with the same = 0.26, but dominated by vacuum energy with 1 - , H₀t₀ 1. If the first globular clusters formed 10⁹ years after the Big Bang, then with 95% confidence H₀t₀ = 1.0 0.3. The classical Einstein de Sitter cosmological model has H₀t₀ = 2/3.