  We report the results of a detailed numerical study designed to estimate both
the absolute age and the uncertainty in age (with confidence limits) of the
oldest globular clusters. Such an estimate is essential if a comparison with
the Hubble age of the universe is to be made to determine the consistency, or
lack thereof, of various cosmological models. Utilizing estimates of the
uncertainty range (and distribution) in the input parameters of stellar
evolution codes we produced 1000 Monte Carlo realizations of stellar
isochrones, with which we could fit the ages of the 18 oldest globular
clusters. Incorporating the observational uncertainties in the measured
color-magnitude diagrams for these systems and the predicted isochrones, we
derived a probability distribution for the mean age of these systems. The
one-sided 95$\%$ C.L.~ lower bound for this distribution occurs at an age of
12.07 Gyr. This puts interesting constraints on cosmology which we discuss.
Further details, including a description of the distributions, covariance
matrices, dependence upon individual input parameters, etc.\ will appear in a
future article.
